Common Weakness Enumeration
CWE-287
DiscouragedImproper Authentication
Abstraction: Class · Status: Draft
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
6675 vulnerabilities reference this CWE, most recent first.
CVE-2026-21891 (GCVE-0-2026-21891)
Vulnerability from cvelistv5 – Published: 2026-01-08 14:00 – Updated: 2026-01-08 15:55
VLAI
EPSS
VEX
Title
ZimaOS has Authentication Bypass via System-Level Username
Summary
ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In versions up to and including 1.5.0, the application checks the validity of the username but appears to skip, misinterpret, or incorrectly validate the password when the provided username matches a known system service account. The application's login function fails to properly handle the password validation result for these users, effectively granting authenticated access to anyone who knows one of these common usernames and provides any password. As of time of publication, no known patched versions are available.
Severity
9.4 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 14:52 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/IceWhaleTech/ZimaOS/security/a… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IceWhaleTech | ZimaOS |
Affected:
<= 1.5.0
|
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CVE-2026-21881 (GCVE-0-2026-21881)
Vulnerability from cvelistv5 – Published: 2026-01-08 01:08 – Updated: 2026-01-08 17:13
VLAI
EPSS
VEX
Title
Kanboard is Vulnerable to Reverse Proxy Authentication Bypass
Summary
Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below is vulnerable to a critical authentication bypass when REVERSE_PROXY_AUTH is enabled. The application blindly trusts HTTP headers for user authentication without verifying the request originated from a trusted reverse proxy. An attacker can impersonate any user, including administrators, by simply sending a spoofed HTTP header. This issue is fixed in version 1.2.49.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 17:13 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/kanboard/kanboard/security/adv… | x_refsource_CONFIRM |
| https://github.com/kanboard/kanboard/commit/7af61… | x_refsource_MISC |
| https://github.com/kanboard/kanboard/releases/tag… | x_refsource_MISC |
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CVE-2026-21854 (GCVE-0-2026-21854)
Vulnerability from cvelistv5 – Published: 2026-01-07 18:14 – Updated: 2026-01-07 18:41
VLAI
EPSS
VEX
Title
Tarkov Data Manager Authentication Bypass vulnerability
Summary
The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, an authentication bypass vulnerability in the login endpoint allows any unauthenticated user to gain full admin access to the Tarkov Data Manager admin panel by exploiting a JavaScript prototype property access vulnerability, combined with loose equality type coercion. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-07 18:40 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/the-hideout/tarkov-data-manage… | x_refsource_CONFIRM |
| https://github.com/the-hideout/tarkov-data-manage… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| the-hideout | tarkov-data-manager |
Affected:
<= 2.0.0
|
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CVE-2026-21508 (GCVE-0-2026-21508)
Vulnerability from cvelistv5 – Published: 2026-02-10 17:51 – Updated: 2026-08-19 16:26
VLAI
EPSS
VEX
Title
Windows Storage Elevation of Privilege Vulnerability
Summary
Improper authentication in Windows Storage allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 04:55 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
22 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.8868
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.8389
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.6937
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.6937
(custom)
|
|
| Microsoft | Windows 11 version 22H3 |
Affected:
10.0.22631.0 , < 10.0.22631.6649
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.6649
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.7840
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.7840
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.1575
(custom)
|
|
| Microsoft | Windows 11 Version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.1575
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.25923
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.25923
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23022
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23022
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.8868
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.8868
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.8389
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.8389
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.4773
(custom)
|
|
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) |
Affected:
10.0.25398.0 , < 10.0.25398.2149
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.32370
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.32370
(custom)
|
Date Public
2026-02-10 16:00
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CVE-2026-20891 (GCVE-0-2026-20891)
Vulnerability from cvelistv5 – Published: 2026-08-11 16:27 – Updated: 2026-08-12 15:33
VLAI
EPSS
VEX
Summary
Improper authentication for some Intel(R) PROSet/Wireless WiFi Software for Windows within Ring 2: Device Drivers may allow an escalation of privilege. Unprivileged software adversary with an unauthenticated user combined with a low complexity attack may enable local code execution. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (low) and availability (low) impacts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:33 UTC
CWE
- Escalation of Privilege
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Intel(R) PROSet/Wireless WiFi Software for Windows |
Affected:
See references
|
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CVE-2026-20885 (GCVE-0-2026-20885)
Vulnerability from cvelistv5 – Published: 2026-08-11 16:26 – Updated: 2026-08-12 15:54
VLAI
EPSS
VEX
Summary
Improper authentication in the Intel(R) TDX module for some Intel(R) platforms within Ring 0: Trust Domain may allow an information disclosure and escalation of privilege. System software adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:53 UTC
CWE
- Escalation of Privilege, Information Disclosure
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Intel(R) platforms |
Affected:
See references
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CVE-2026-20752 (GCVE-0-2026-20752)
Vulnerability from cvelistv5 – Published: 2026-08-11 16:25 – Updated: 2026-08-12 15:48
VLAI
EPSS
VEX
Summary
Improper authentication for some Intel(R) PROSet/Wireless WiFi Software within Ring 0: Kernel may allow an information disclosure. System software adversary with a privileged user combined with a low complexity attack may enable data exposure. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 15:47 UTC
CWE
- Information Disclosure
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Intel(R) PROSet/Wireless WiFi Software |
Affected:
See references
|
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CVE-2026-20317 (GCVE-0-2026-20317)
Vulnerability from cvelistv5 – Published: 2026-08-19 16:19 – Updated: 2026-08-20 15:57
VLAI
EPSS
VEX
CVE Program bundle warning
The CVE Program recognizes that this CVE Record provides vulnerability information that a Supplier CNA believes is very important to consumers. The CVE Program has flagged this CVE Record as it assigns a single CVE ID to a collection of individual vulnerabilities which does not align with CVE's "one vulnerability, one ID" principle, and therefore provides incomplete information. For further clarification, please see the CVE Program's blog, "Preserving Vulnerability-Level Identification" linked below. Details within the CNA container below are viewable by clicking on the CNA name.
https://www.cve.org/Media/News/item/blog/2026/06/…Title
Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Authentication Vulnerabilities
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Workload engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20317 are related to improper authentication issues that are grouped under the Common Weakness Enumeration (CWE) CWE-287.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:40 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Workload |
Affected:
2.2.1.41
Affected: 3.2.1.18 Affected: 3.3.2.50 Affected: 3.4.1.28 Affected: 3.4.1.34 Affected: 2.3.1.45 Affected: 2.3.1.41 Affected: 3.3.2.28 Affected: 3.1.1.59 Affected: 2.0.2.20 Affected: 2.1.1.33 Affected: 2.1.1.29 Affected: 3.2.1.28 Affected: 3.4.1.35 Affected: 3.1.1.65 Affected: 3.1.1.67 Affected: 2.0.1.34 Affected: 2.3.1.49 Affected: 2.2.1.39 Affected: 3.4.1.19 Affected: 3.3.2.23 Affected: 3.1.1.61 Affected: 3.1.1.54 Affected: 3.5.1.17 Affected: 3.3.2.33 Affected: 3.5.1.1 Affected: 2.3.1.53 Affected: 3.5.1.20 Affected: 3.5.1.30 Affected: 3.3.2.16 Affected: 3.1.1.55 Affected: 3.4.1.6 Affected: 2.3.1.50 Affected: 2.3.1.52 Affected: 3.2.1.19 Affected: 2.2.1.35 Affected: 3.1.1.53 Affected: 3.1.1.70 Affected: 3.2.1.20 Affected: 3.5.1.2 Affected: 1.103.1.12 Affected: 2.3.1.51 Affected: 3.3.2.42 Affected: 3.4.1.1 Affected: 3.3.2.12 Affected: 2.1.1.31 Affected: 3.5.1.23 Affected: 3.3.2.53 Affected: 3.4.1.14 Affected: 3.3.2.2 Affected: 3.4.1.20 Affected: 3.3.2.35 Affected: 2.2.1.34 Affected: 1.102.21 Affected: 3.3.2.5 Affected: 3.5.1.31 Affected: 3.6.1.5 Affected: 3.2.1.31 Affected: 3.5.1.37 Affected: 3.4.1.40 Affected: 3.6.1.17 Affected: 3.6.1.21 Affected: 3.2.1.32 Affected: 3.2.1.33 Affected: 3.6.1.35 Affected: 3.6.1.36 Affected: 3.7.1.5 Affected: 3.6.1.47 Affected: 3.7.1.22 Affected: 3.6.1.52 Affected: 3.7.1.39 Affected: 3.8.1.1 Affected: 3.7.1.51 Affected: 3.8.1.19 Affected: 3.8.1.36 Affected: 3.7.1.59 Affected: 3.8.1.39 Affected: 3.9.1.1 Affected: 3.9.1.10 Affected: 3.9.1.24 Affected: 3.9.1.25 Affected: 3.9.1.28 Affected: 3.9.1.38 Affected: 3.8.1.53 Affected: 3.9.1.52 Affected: 3.10.1.1 Affected: 3.9.1.64 Affected: 3.10.2.11 Affected: 3.9.1.66 Affected: 3.10.3.19 Affected: 3.9.1.69 Affected: 3.10.4.8 Affected: 3.10.5.6 Affected: 4.0.1.1 Affected: 4.0.2.4 Affected: 4.0.2.5 Affected: 3.10.6.3 Affected: 3.10.7.4 Affected: 4.0.3.13 Affected: 4.0.3.17 Affected: 3.10.8.3 |
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GCVE-1-2026-20246 (CVE-2026-90961)
Vulnerability from gna-1 – Published: 2026-09-14 13:21 – Updated: 2026-09-14 13:22
VLAI
EPSS
VEX
Title
MISP LdapAuth and LinOTPAuth Authentication Bypass via Empty or Non-String Credentials
Summary
The LdapAuth and LinOTPAuth authentication plugins in MISP contain an authentication bypass vulnerability. Both LdapAuthenticate and LinOTPAuthenticate replace CakePHP's FormAuthenticate class but fail to replicate its _checkFields() input validation guard. As a result, the email and password fields extracted from the login request are passed to downstream authentication logic without verifying that they are non-empty strings.
In the LDAP authenticator, an empty or null password is forwarded to ldap_bind(). Per RFC 4513 section 5.1.2, a bind request with a valid DN and an empty password constitutes an unauthenticated bind, which many LDAP directory servers accept as successful. An attacker who knows any valid user email address in the directory can therefore authenticate as that user without possessing a password. Additionally, non-string values (null, false, arrays) are either coerced to empty strings by ldap_bind(), raise TypeErrors, or are misinterpreted as find conditions in _findUser(), all of which can lead to unintended authentication outcomes.
In the LinOTP authenticator, the same missing guard allows non-string credentials to be concatenated into the LinOTP verification request, and in the mixed-authentication branch an empty password is accepted against a stored hash of the empty string.
A secondary issue in the LDAP authenticator is that newly created user accounts (auto-provisioned on first LDAP login) were assigned an empty password. Because the save path skips validation, the empty string is hashed and stored. If the user later ceases to be found in LDAP and the mixed-authentication fallback is used, the stored hash of the empty string verifies against an empty password, again permitting unauthenticated access.
The vulnerability requires that the affected plugin (LdapAuth or LinOTPAuth) is enabled on the MISP instance and that the attacker knows at least one valid email address registered in the directory or MISP user store. No prior authentication is required. Successful exploitation grants the attacker the full privileges of the impersonated user, which may include administrative access to threat intelligence data.
Version affected: ≤2.5.45
Severity
Assigner
GNA-1
This instance
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/0ee058548 | patch |
GCVE extensions
AI-generated
Confidence: high
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
AI involvement
GCVE-BCP-05-X-01
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
| Model | Source | Identifier |
|---|---|---|
| qwen3.8:27b | ollama | qwen3.8:27b |
Patch provenance
GCVE-BCP-05-X-02
- Generator
-
patch2vuln.pyon 2026-09-14 13:14 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/0ee058548.patch
01b60b396532… - Confidence
- high
| Commit | Subject | Patch SHA-256 |
|---|---|---|
0ee0585486cd
|
fix: [security] Reject empty and non-string credentials in | 01b60b396532… |
Fix summary
The fix adds explicit type and emptiness validation for the email and password fields in both LdapAuthenticate and LinOTPAuthenticate before any authentication logic is invoked. Non-string or empty credentials are rejected with a logged error and a false return. Additionally, the LDAP authenticator now assigns a cryptographically random password to auto-provisioned user accounts instead of an empty string, preventing the stored hash of '' from being verifiable in the mixed-authentication fallback path. The LinOTP authenticator also rejects an empty password specifically in the mixed-authentication branch where the password is checked against the local database.
Patch summary
In LdapAuthenticate.php: (1) email and password are now extracted with isset() defaults to empty string; (2) a guard clause checks is_string() and non-emptiness for both fields, logging an error and returning false on failure; (3) the auto-provisioned user creation block now calls $userModel->generateRandomPassword() and stores that value in both 'password' and 'confirm_password' fields instead of empty strings. In LinOTPAuthenticate.php: (1) email, password, and otp are extracted with isset() defaults; (2) a guard clause checks is_string() and non-emptiness for email and is_string() for password, logging and returning false on failure; (3) in the mixed-authentication branch, an additional check rejects an empty password before calling _findUser().
CVSS rationale
AV:N: The vulnerability is exploitable over the network via the MISP web login endpoint. AC:L: Exploitation requires only sending a login request with an empty or non-string password field; no race conditions, specific directory configuration beyond accepting unauthenticated binds (which is common), or other special conditions are needed. AT:N: No attack target manipulation is required. PR:N: No prior authentication is needed; the attacker is attempting to authenticate. UI:N: No user interaction is required. VC:H: Successful exploitation grants the attacker the full data-access privileges of the impersonated user, potentially including all MISP threat intelligence data. VI:H: The attacker can create, modify, or delete MISP objects, tags, and configurations at the privilege level of the impersonated user. VA:N: No direct availability impact is demonstrated. SC/SI/SA:N: No separate subsequent system is identified; the impact is contained to the MISP instance itself.
Weakness rationale
- CWE-287 The primary impact is an authentication bypass: empty or non-string credentials allow an unauthenticated attacker to be authenticated as a known directory user. The root cause is the absence of the credential validation guard that FormAuthenticate normally provides.
- CWE-20 The underlying technical weakness is the failure to validate that user-supplied credential fields are non-empty strings before passing them to ldap_bind(), the LinOTP verifier, or _findUser(). Non-string types (null, false, arrays) and empty strings are all accepted and produce unintended authentication behavior.
Assumptions to verify
- The LDAP directory server is configured to accept unauthenticated (empty-password) binds, which is common but not universal; if the directory rejects empty-password binds, the LDAP-specific bypass is mitigated at the directory level, though the non-string credential and empty-password-hash issues remain.
- The attacker must know at least one valid email address that exists in the LDAP directory or MISP user store.
- The LdapAuth or LinOTPAuth plugin is enabled on the affected MISP instance.
- CVSS impact ratings assume the attacker can impersonate a user with high privileges (e.g., admin); actual impact scales with the privileges of the specific user impersonated.
- The exact fixed version is not specified in the patch metadata; the fix commit is 238 commits after tag v2.5.46, suggesting the fix landed in a release after 2.5.46, but the precise version boundary is unconfirmed.
- The LinOTP empty-password bypass in the mixed-auth branch requires the mixedauth setting to be enabled.
Model comparison
Selected qwen3.8:27b
by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.
| Model | Score | Agreement | Confidence | Assumptions |
|---|---|---|---|---|
qwen3.8:27b |
5 | 9 | high | 6 |
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CVE-2026-20182 (GCVE-0-2026-20182)
Vulnerability from cvelistv5 – Published: 2026-05-14 16:08 – Updated: 2026-06-16 17:57
VLAI
EPSS
VEX
Title
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
Summary
May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks.
A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.
This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.
Severity
10 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 00:00 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Controller |
Affected:
20.6.4
Affected: 20.9.2 Affected: 20.3.6 Affected: 20.7.2 Affected: 20.7.1 Affected: 20.5.1 Affected: 20.6.2 Affected: 19.3.0 Affected: 20.6.1 Affected: 17.2.4 Affected: 18.2.0 Affected: 18.4.6 Affected: 19.1.0 Affected: 19.2.4 Affected: 19.2.929 Affected: 18.3.8 Affected: 18.4.303 Affected: 18.3.7 Affected: 18.4.1 Affected: 19.2.097 Affected: 19.2.0 Affected: 19.2.099 Affected: 18.3.6 Affected: 20.4.2 Affected: 19.0.0 Affected: 20.9.1 Affected: 20.3.5 Affected: 20.3.1 Affected: 18.3.5 Affected: 20.6.3 Affected: 18.4.3 Affected: 18.4.4 Affected: 18.3.3 Affected: 17.2.8 Affected: 20.8.1 Affected: 19.2.32 Affected: 19.2.2 Affected: 17.2.5 Affected: 18.4.0 Affected: 20.4.1.1 Affected: 20.1.3 Affected: 20.1.2 Affected: 17.2.10 Affected: 19.2.098 Affected: 20.1.1 Affected: 17.2.6 Affected: 19.2.1 Affected: 18.3.4 Affected: 20.4.1 Affected: 17.2.9 Affected: 19.2.31 Affected: 19.0.1a Affected: 18.3.0 Affected: 17.2.7 Affected: 18.4.5 Affected: 20.3.4 Affected: 20.3.3 Affected: 20.4.1.2 Affected: 20.3.2 Affected: 18.3.1 Affected: 20.1.12 Affected: 19.2.3 Affected: 20.10.1 Affected: 20.6.5 Affected: 20.3.7 Affected: 20.9.3 Affected: 20.11.1 Affected: 20.6.3.2 Affected: 20.4.2.3 Affected: 20.3.5.1 Affected: 20.3.4.3 Affected: 20.9.3.1 Affected: 20.6.4.1 Affected: 20.3.3.2 Affected: 20.6.5.2 Affected: 20.3.7.1 Affected: 20.11.1.1 Affected: 20.10.1.1 Affected: 20.6.1.2 Affected: 20.1.3.1 Affected: 20.9.2.2 Affected: 20.6.5.3 Affected: 20.6.3.3 Affected: 20.3.7.2 Affected: 20.6.5.4 Affected: 20.9.2.3 Affected: 20.9.4 Affected: 20.12.1 Affected: 20.3.8 Affected: 20.6.6 Affected: 20.12.2 Affected: 20.13.1 Affected: 20.9.5 Affected: 20.12.3 Affected: 20.6.7 Affected: 20.9.5.1 Affected: 20.14.1 Affected: 20.12.3.1 Affected: 20.12.4 Affected: 20.15.1 Affected: 20.9.6 Affected: 20.6.8 Affected: 20.16.1 Affected: 20.9.5.3 Affected: 20.12.4.1 Affected: 20.15.2 Affected: 20.12.5 Affected: 20.9.7 Affected: 20.15.3 Affected: 20.12.5.1 Affected: 20.12.5.2 Affected: 20.15.4 Affected: 20.9.7.1 Affected: 20.12.6 Affected: 20.9.8 Affected: 20.15.4.1 Affected: 20.15.4.2 Affected: 20.12.5.3 Affected: 20.12.6.1 Affected: 20.9.8.2 Affected: 20.15.5 Affected: 20.12.7 Affected: 20.9.9 Affected: 20.15.5.1 Affected: 20.15.4.3 Affected: 20.15.4.5 Affected: 20.15.5.3 Affected: 20.12.7.2 Affected: 20.9.9.2 |
|
| Cisco | Cisco Catalyst SD-WAN Manager |
Affected:
20.1.12
Affected: 19.2.1 Affected: 18.4.4 Affected: 18.4.5 Affected: 20.1.1.1 Affected: 20.1.1 Affected: 19.2.099 Affected: 18.3.6 Affected: 18.3.7 Affected: 19.2.0 Affected: 19.1.0 Affected: 18.4.303 Affected: 19.2.098 Affected: 18.3.6.1 Affected: 18.2.0 Affected: 17.2.8 Affected: 18.3.3.1 Affected: 18.4.0 Affected: 18.3.1 Affected: 17.2.6 Affected: 17.2.9 Affected: 17.2.5 Affected: 18.4.0.1 Affected: 18.3.3 Affected: 18.3.0 Affected: 19.2.3 Affected: 18.4.501_ES Affected: 20.1.2 Affected: 19.2.929 Affected: 19.2.31 Affected: 20.3.2 Affected: 19.2.4 Affected: 19.2.4.0.9 Affected: 20.1.3.1 |
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"lang": "en",
"time": "2026-05-14T00:00:00.000Z",
"value": "CVE-2026-20182 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Catalyst SD-WAN Controller",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "20.6.4"
},
{
"status": "affected",
"version": "20.9.2"
},
{
"status": "affected",
"version": "20.3.6"
},
{
"status": "affected",
"version": "20.7.2"
},
{
"status": "affected",
"version": "20.7.1"
},
{
"status": "affected",
"version": "20.5.1"
},
{
"status": "affected",
"version": "20.6.2"
},
{
"status": "affected",
"version": "19.3.0"
},
{
"status": "affected",
"version": "20.6.1"
},
{
"status": "affected",
"version": "17.2.4"
},
{
"status": "affected",
"version": "18.2.0"
},
{
"status": "affected",
"version": "18.4.6"
},
{
"status": "affected",
"version": "19.1.0"
},
{
"status": "affected",
"version": "19.2.4"
},
{
"status": "affected",
"version": "19.2.929"
},
{
"status": "affected",
"version": "18.3.8"
},
{
"status": "affected",
"version": "18.4.303"
},
{
"status": "affected",
"version": "18.3.7"
},
{
"status": "affected",
"version": "18.4.1"
},
{
"status": "affected",
"version": "19.2.097"
},
{
"status": "affected",
"version": "19.2.0"
},
{
"status": "affected",
"version": "19.2.099"
},
{
"status": "affected",
"version": "18.3.6"
},
{
"status": "affected",
"version": "20.4.2"
},
{
"status": "affected",
"version": "19.0.0"
},
{
"status": "affected",
"version": "20.9.1"
},
{
"status": "affected",
"version": "20.3.5"
},
{
"status": "affected",
"version": "20.3.1"
},
{
"status": "affected",
"version": "18.3.5"
},
{
"status": "affected",
"version": "20.6.3"
},
{
"status": "affected",
"version": "18.4.3"
},
{
"status": "affected",
"version": "18.4.4"
},
{
"status": "affected",
"version": "18.3.3"
},
{
"status": "affected",
"version": "17.2.8"
},
{
"status": "affected",
"version": "20.8.1"
},
{
"status": "affected",
"version": "19.2.32"
},
{
"status": "affected",
"version": "19.2.2"
},
{
"status": "affected",
"version": "17.2.5"
},
{
"status": "affected",
"version": "18.4.0"
},
{
"status": "affected",
"version": "20.4.1.1"
},
{
"status": "affected",
"version": "20.1.3"
},
{
"status": "affected",
"version": "20.1.2"
},
{
"status": "affected",
"version": "17.2.10"
},
{
"status": "affected",
"version": "19.2.098"
},
{
"status": "affected",
"version": "20.1.1"
},
{
"status": "affected",
"version": "17.2.6"
},
{
"status": "affected",
"version": "19.2.1"
},
{
"status": "affected",
"version": "18.3.4"
},
{
"status": "affected",
"version": "20.4.1"
},
{
"status": "affected",
"version": "17.2.9"
},
{
"status": "affected",
"version": "19.2.31"
},
{
"status": "affected",
"version": "19.0.1a"
},
{
"status": "affected",
"version": "18.3.0"
},
{
"status": "affected",
"version": "17.2.7"
},
{
"status": "affected",
"version": "18.4.5"
},
{
"status": "affected",
"version": "20.3.4"
},
{
"status": "affected",
"version": "20.3.3"
},
{
"status": "affected",
"version": "20.4.1.2"
},
{
"status": "affected",
"version": "20.3.2"
},
{
"status": "affected",
"version": "18.3.1"
},
{
"status": "affected",
"version": "20.1.12"
},
{
"status": "affected",
"version": "19.2.3"
},
{
"status": "affected",
"version": "20.10.1"
},
{
"status": "affected",
"version": "20.6.5"
},
{
"status": "affected",
"version": "20.3.7"
},
{
"status": "affected",
"version": "20.9.3"
},
{
"status": "affected",
"version": "20.11.1"
},
{
"status": "affected",
"version": "20.6.3.2"
},
{
"status": "affected",
"version": "20.4.2.3"
},
{
"status": "affected",
"version": "20.3.5.1"
},
{
"status": "affected",
"version": "20.3.4.3"
},
{
"status": "affected",
"version": "20.9.3.1"
},
{
"status": "affected",
"version": "20.6.4.1"
},
{
"status": "affected",
"version": "20.3.3.2"
},
{
"status": "affected",
"version": "20.6.5.2"
},
{
"status": "affected",
"version": "20.3.7.1"
},
{
"status": "affected",
"version": "20.11.1.1"
},
{
"status": "affected",
"version": "20.10.1.1"
},
{
"status": "affected",
"version": "20.6.1.2"
},
{
"status": "affected",
"version": "20.1.3.1"
},
{
"status": "affected",
"version": "20.9.2.2"
},
{
"status": "affected",
"version": "20.6.5.3"
},
{
"status": "affected",
"version": "20.6.3.3"
},
{
"status": "affected",
"version": "20.3.7.2"
},
{
"status": "affected",
"version": "20.6.5.4"
},
{
"status": "affected",
"version": "20.9.2.3"
},
{
"status": "affected",
"version": "20.9.4"
},
{
"status": "affected",
"version": "20.12.1"
},
{
"status": "affected",
"version": "20.3.8"
},
{
"status": "affected",
"version": "20.6.6"
},
{
"status": "affected",
"version": "20.12.2"
},
{
"status": "affected",
"version": "20.13.1"
},
{
"status": "affected",
"version": "20.9.5"
},
{
"status": "affected",
"version": "20.12.3"
},
{
"status": "affected",
"version": "20.6.7"
},
{
"status": "affected",
"version": "20.9.5.1"
},
{
"status": "affected",
"version": "20.14.1"
},
{
"status": "affected",
"version": "20.12.3.1"
},
{
"status": "affected",
"version": "20.12.4"
},
{
"status": "affected",
"version": "20.15.1"
},
{
"status": "affected",
"version": "20.9.6"
},
{
"status": "affected",
"version": "20.6.8"
},
{
"status": "affected",
"version": "20.16.1"
},
{
"status": "affected",
"version": "20.9.5.3"
},
{
"status": "affected",
"version": "20.12.4.1"
},
{
"status": "affected",
"version": "20.15.2"
},
{
"status": "affected",
"version": "20.12.5"
},
{
"status": "affected",
"version": "20.9.7"
},
{
"status": "affected",
"version": "20.15.3"
},
{
"status": "affected",
"version": "20.12.5.1"
},
{
"status": "affected",
"version": "20.12.5.2"
},
{
"status": "affected",
"version": "20.15.4"
},
{
"status": "affected",
"version": "20.9.7.1"
},
{
"status": "affected",
"version": "20.12.6"
},
{
"status": "affected",
"version": "20.9.8"
},
{
"status": "affected",
"version": "20.15.4.1"
},
{
"status": "affected",
"version": "20.15.4.2"
},
{
"status": "affected",
"version": "20.12.5.3"
},
{
"status": "affected",
"version": "20.12.6.1"
},
{
"status": "affected",
"version": "20.9.8.2"
},
{
"status": "affected",
"version": "20.15.5"
},
{
"status": "affected",
"version": "20.12.7"
},
{
"status": "affected",
"version": "20.9.9"
},
{
"status": "affected",
"version": "20.15.5.1"
},
{
"status": "affected",
"version": "20.15.4.3"
},
{
"status": "affected",
"version": "20.15.4.5"
},
{
"status": "affected",
"version": "20.15.5.3"
},
{
"status": "affected",
"version": "20.12.7.2"
},
{
"status": "affected",
"version": "20.9.9.2"
}
]
},
{
"defaultStatus": "unknown",
"product": "Cisco Catalyst SD-WAN Manager",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "20.1.12"
},
{
"status": "affected",
"version": "19.2.1"
},
{
"status": "affected",
"version": "18.4.4"
},
{
"status": "affected",
"version": "18.4.5"
},
{
"status": "affected",
"version": "20.1.1.1"
},
{
"status": "affected",
"version": "20.1.1"
},
{
"status": "affected",
"version": "19.2.099"
},
{
"status": "affected",
"version": "18.3.6"
},
{
"status": "affected",
"version": "18.3.7"
},
{
"status": "affected",
"version": "19.2.0"
},
{
"status": "affected",
"version": "19.1.0"
},
{
"status": "affected",
"version": "18.4.303"
},
{
"status": "affected",
"version": "19.2.098"
},
{
"status": "affected",
"version": "18.3.6.1"
},
{
"status": "affected",
"version": "18.2.0"
},
{
"status": "affected",
"version": "17.2.8"
},
{
"status": "affected",
"version": "18.3.3.1"
},
{
"status": "affected",
"version": "18.4.0"
},
{
"status": "affected",
"version": "18.3.1"
},
{
"status": "affected",
"version": "17.2.6"
},
{
"status": "affected",
"version": "17.2.9"
},
{
"status": "affected",
"version": "17.2.5"
},
{
"status": "affected",
"version": "18.4.0.1"
},
{
"status": "affected",
"version": "18.3.3"
},
{
"status": "affected",
"version": "18.3.0"
},
{
"status": "affected",
"version": "19.2.3"
},
{
"status": "affected",
"version": "18.4.501_ES"
},
{
"status": "affected",
"version": "20.1.2"
},
{
"status": "affected",
"version": "19.2.929"
},
{
"status": "affected",
"version": "19.2.31"
},
{
"status": "affected",
"version": "20.3.2"
},
{
"status": "affected",
"version": "19.2.4"
},
{
"status": "affected",
"version": "19.2.4.0.9"
},
{
"status": "affected",
"version": "20.1.3.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks.\u0026nbsp;\r\n\r\nA vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\r\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric."
}
],
"exploits": [
{
"lang": "en",
"value": "In May 2026, the Cisco Product Security Incident Response Team (PSIRT) became aware of limited exploitation of this vulnerability. Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "Improper Authentication",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-16T17:57:59.048Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-sdwan-rpa2-v69WY2SW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW"
},
{
"name": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability\u003c/a\u003e was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The \u003ca href=\"#IOC\"\u003eIndicators of Compromise",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk"
}
],
"source": {
"advisory": "cisco-sa-sdwan-rpa2-v69WY2SW",
"defects": [
"CSCwt50498"
],
"discovery": "EXTERNAL"
},
"title": "Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20182",
"datePublished": "2026-05-14T16:08:25.566Z",
"dateReserved": "2025-10-08T11:59:15.393Z",
"dateUpdated": "2026-06-16T17:57:59.048Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Architecture and Design
Strategy: Libraries or Frameworks
Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
CAPEC-114: Authentication Abuse
An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.
CAPEC-115: Authentication Bypass
An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.
CAPEC-151: Identity Spoofing
Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.
CAPEC-194: Fake the Source of Data
An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.
CAPEC-22: Exploiting Trust in Client
An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.
CAPEC-593: Session Hijacking
This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.
CAPEC-633: Token Impersonation
An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.
CAPEC-650: Upload a Web Shell to a Web Server
By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.
CAPEC-94: Adversary in the Middle (AiTM)
An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.