Common Weakness Enumeration

CWE-287

Discouraged

Improper Authentication

Abstraction: Class · Status: Draft

API response cwe.mitre.org

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

5954 vulnerabilities reference this CWE, most recent first.

CVE-2026-49843 (GCVE-0-2026-49843)

Vulnerability from cvelistv5 – Published: 2026-06-09 16:04 – Updated: 2026-06-10 13:47
VLAI
Title
FreeSWITCH: Pre-authentication session eviction via attacker-chosen `sessid` in `mod_verto`
Summary
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, mod_verto's JSON-RPC handler bound the connection to the client-supplied sessid on the first frame, before the authentication gate. Binding inserts the connection into the global session hash and, on a key collision, drops the prior occupant of that slot — sending it a verto.punt, detaching its calls, and closing its socket. An unauthenticated network attacker who knows a target session UUID could therefore evict the legitimate client. This issue has been patched in version 1.11.1.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
signalwire freeswitch Affected: < 1.11.1
Create a notification for this product.
Show details on NVD website
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CVE-2026-49502 (GCVE-0-2026-49502)

Vulnerability from cvelistv5 – Published: 2026-06-17 14:30 – Updated: 2026-06-25 12:59
VLAI
Summary
Dell PowerFlex Manager, version(s) prior to 5.1.0.1, contain(s) an Improper Authentication vulnerability. An unauthenticated attacker with adjacent network access could potentially exploit this vulnerability, leading to Information disclosure, Information tampering, and Unauthorized access.
Severity
7.4 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Dell PowerFlex Affected: 0 , < 5.1.0.1 or later (semver)
Affected: 0 , < 4.5.5.2 or later (semver)
Create a notification for this product.
Date Public
2026-06-15 06:30
Credits
Dell would like to thank brocked200 for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-49454 (GCVE-0-2026-49454)

Vulnerability from cvelistv5 – Published: 2026-06-18 20:52 – Updated: 2026-06-22 15:51
VLAI
Title
Relyra SAML SignatureValue not cryptographically verified -> authentication bypass
Summary
Relyra is a strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix. Versions 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication result. The XMLDSig trust boundary was incomplete as :public_key.verify over the exclusive-C14N canonicalized SignedInfo was not performed against the configured IdP certificate's public key, DigestValue was not recomputed over the canonicalized referenced element, and canonicalize/2 remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes. A forged SignatureValue carrying an attacker-controlled NameID could be accepted as {:ok}. This issue has been fixed in version 1.2.0.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
szTheory relyra Affected: >= 1.0.0, < 1.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-49448 (GCVE-0-2026-49448)

Vulnerability from cvelistv5 – Published: 2026-06-02 20:31 – Updated: 2026-06-03 12:46
VLAI
Title
authentik: SourceStage bypass via empty POST
Summary
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, the Source stage can be bypassed by sending an empty POST. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
goauthentik authentik Affected: < 2025.12.6
Affected: < 2026.2.4
Affected: < 2026.5.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-49443 (GCVE-0-2026-49443)

Vulnerability from cvelistv5 – Published: 2026-06-02 20:31 – Updated: 2026-06-03 13:59
VLAI
Title
authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API
Summary
authentik is an open-source identity provider. Prior to versions 2025.12.6, 2026.2.4, and 2026.5.1, an attacker with the ability to change a source connection, and an account in one of the configured sources can log into any account. This issue has been patched in versions 2025.12.6, 2026.2.4, and 2026.5.1.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
goauthentik authentik Affected: < 2025.12.6
Affected: < 2026.2.4
Affected: < 2026.5.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-49203 (GCVE-0-2026-49203)

Vulnerability from cvelistv5 – Published: 2026-06-04 06:25 – Updated: 2026-06-04 12:32
VLAI
Title
Unauthenticated eSIM Configuration Manipulation
Summary
Crucial management API endpoints for cellular eSIM allocation do not validate caller authorization, allowing remote profiles to be rewritten or deleted.
Severity
7.2 (High)
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Acer Connect M6E 5G Portable WiFi Router Affected: * , ≤ M6E_AI_1.00.000019 (custom)
Create a notification for this product.
Credits
Ta-Lun Yen
Show details on NVD website
To clipboard 

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CVE-2026-49202 (GCVE-0-2026-49202)

Vulnerability from cvelistv5 – Published: 2026-06-04 06:30 – Updated: 2026-06-04 12:32
VLAI
Title
Unverified Meeting Recording Endpoints & Permissive CORS
Summary
Internal multimedia session archives are accessible without authentication, exacerbated by loose Cross-Origin Resource Sharing (CORS) rules that allow cross-site theft.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Acer Connect M6E 5G Portable WiFi Router Affected: * , ≤ M6E_AI_1.00.000019 (custom)
Create a notification for this product.
Credits
Ta-Lun Yen
Show details on NVD website
To clipboard 

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CVE-2026-49197 (GCVE-0-2026-49197)

Vulnerability from cvelistv5 – Published: 2026-05-29 08:24 – Updated: 2026-05-29 11:34
VLAI
Title
Predator Connect W6x: Improper Authentication
Summary
Web endpoints intended for the Acer Connect app improperly validate the HTTP Authorization header, failing to block requests when Base64 decoding fails.
Severity
10 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Acer Predator Connect W6x Affected: W6x_GBL_2.00.000005 , ≤ * (custom)
Create a notification for this product.
Credits
rethesis
Show details on NVD website
To clipboard 

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CVE-2026-49194 (GCVE-0-2026-49194)

Vulnerability from cvelistv5 – Published: 2026-06-04 06:21 – Updated: 2026-06-04 12:34
VLAI
Title
SCREEN_CLICK Authentication Bypass
Summary
The debugging routine SCREEN_CLICK(5053) enables a connection to skip the standard device login prompt entirely and directly enter an interactive shell interface.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Acer Connect M6E 5G Portable WiFi Router Affected: * , ≤ M6E_AI_1.00.000019 (custom)
Create a notification for this product.
Credits
Ta-Lun Yen
Show details on NVD website
To clipboard 

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CVE-2026-49191 (GCVE-0-2026-49191)

Vulnerability from cvelistv5 – Published: 2026-06-04 05:36 – Updated: 2026-06-04 12:40
VLAI
Title
Exposed Hard-coded M3WebServer Backend API Key
Summary
The production build of the M3WebServer hard-codes its backend API keys, which can be easily intercepted through verbose error handling pages.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
Acer Connect M6E 5G Portable WiFi Router Affected: * , ≤ M6E_AI_1.00.000019 (custom)
Create a notification for this product.
Credits
Ta-Lun Yen
Show details on NVD website
To clipboard 

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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.

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