CWE-754
Allowed-with-ReviewImproper Check for Unusual or Exceptional Conditions
Abstraction: Class · Status: Incomplete
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
905 vulnerabilities reference this CWE, most recent first.
GHSA-X6HC-2WHC-99QV
Vulnerability from github – Published: 2022-05-24 17:36 – Updated: 2022-05-24 17:36A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.
{
"affected": [],
"aliases": [
"CVE-2020-7539"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-12-11T01:15:00Z",
"severity": "HIGH"
},
"details": "A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause a denial of service vulnerability when a specially crafted packet is sent to the controller over HTTP.",
"id": "GHSA-x6hc-2whc-99qv",
"modified": "2022-05-24T17:36:07Z",
"published": "2022-05-24T17:36:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7539"
},
{
"type": "WEB",
"url": "https://www.se.com/ww/en/download/document/SEVD-2020-343-03"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-X75F-CHMC-5VJC
Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2025-09-05 18:31The sequence of packets received by a Networking server are not correctly checked.
An attacker could exploit this vulnerability to send specially crafted messages to force the application to stop.
{
"affected": [],
"aliases": [
"CVE-2025-9998"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-05T17:15:40Z",
"severity": "MODERATE"
},
"details": "The sequence of packets received by a Networking server are not correctly checked.\n\nAn attacker could exploit this vulnerability to send specially crafted messages to force the application to stop.",
"id": "GHSA-x75f-chmc-5vjc",
"modified": "2025-09-05T18:31:25Z",
"published": "2025-09-05T18:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9998"
},
{
"type": "WEB",
"url": "https://www.pcvue.com/security/#SB2025-4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:M/U:Green",
"type": "CVSS_V4"
}
]
}
GHSA-X87Q-GPR2-R7WM
Vulnerability from github – Published: 2022-04-22 00:00 – Updated: 2022-05-04 00:00A vulnerability in the Cisco Discovery Protocol of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, adjacent attacker to cause a kernel panic on an affected system, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect processing of certain Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by continuously sending certain Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause a kernel panic on the system that is running the affected software, resulting in a DoS condition.
{
"affected": [],
"aliases": [
"CVE-2022-20804"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-04-21T19:15:00Z",
"severity": "MODERATE"
},
"details": "A vulnerability in the Cisco Discovery Protocol of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, adjacent attacker to cause a kernel panic on an affected system, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect processing of certain Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by continuously sending certain Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause a kernel panic on the system that is running the affected software, resulting in a DoS condition.",
"id": "GHSA-x87q-gpr2-r7wm",
"modified": "2022-05-04T00:00:37Z",
"published": "2022-04-22T00:00:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20804"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucm-dos-zHS9X9kD"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-X8M6-M5RQ-285X
Vulnerability from github – Published: 2024-04-08 03:30 – Updated: 2024-11-05 21:30In ngmm, there is a possible undefined behavior due to incorrect error handling. This could lead to remote denial of service with no additional execution privileges needed
{
"affected": [],
"aliases": [
"CVE-2023-52534"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-08T03:15:08Z",
"severity": "MODERATE"
},
"details": "In ngmm, there is a possible undefined behavior due to incorrect error handling. This could lead to remote denial of service with no additional execution privileges needed",
"id": "GHSA-x8m6-m5rq-285x",
"modified": "2024-11-05T21:30:31Z",
"published": "2024-04-08T03:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52534"
},
{
"type": "WEB",
"url": "https://www.unisoc.com/en_us/secy/announcementDetail/1777148475750809602"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-X8XC-VCQW-36QC
Vulnerability from github – Published: 2024-03-04 03:30 – Updated: 2024-08-22 21:31In pq, there is a possible write-what-where condition due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08495937; Issue ID: ALPS08495937.
{
"affected": [],
"aliases": [
"CVE-2024-20037"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-04T03:15:07Z",
"severity": "MODERATE"
},
"details": "In pq, there is a possible write-what-where condition due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08495937; Issue ID: ALPS08495937.",
"id": "GHSA-x8xc-vcqw-36qc",
"modified": "2024-08-22T21:31:27Z",
"published": "2024-03-04T03:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-20037"
},
{
"type": "WEB",
"url": "https://corp.mediatek.com/product-security-bulletin/March-2024"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-X9PJ-5QM2-7P6V
Vulnerability from github – Published: 2025-01-08 18:30 – Updated: 2025-11-03 21:32In the Linux kernel, the following vulnerability has been resolved:
drm/sti: avoid potential dereference of error pointers in sti_hqvdp_atomic_check
The return value of drm_atomic_get_crtc_state() needs to be checked. To avoid use of error pointer 'crtc_state' in case of the failure.
{
"affected": [],
"aliases": [
"CVE-2024-56778"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-08T18:15:18Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sti: avoid potential dereference of error pointers in sti_hqvdp_atomic_check\n\nThe return value of drm_atomic_get_crtc_state() needs to be\nchecked. To avoid use of error pointer \u0027crtc_state\u0027 in case\nof the failure.",
"id": "GHSA-x9pj-5qm2-7p6v",
"modified": "2025-11-03T21:32:05Z",
"published": "2025-01-08T18:30:49Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56778"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31c857e7496d34e5a32a6f75bc024d0b06fd646a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b0d0d6e9d3c26697230bf7dc9e6b52bdb24086f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/82a5312f874fb18f045d9658e9bd290e3b0621c0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/837eb99ad3340c7a9febf454f41c8e3edb68ac1e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c1ab40a1fdfee732c7e6ff2fb8253760293e47e8"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XC8C-X7J7-PR89
Vulnerability from github – Published: 2022-08-31 00:00 – Updated: 2022-09-07 00:01An unauthenticated user can overload a part of HCL VersionVault Express and cause a denial of service.
{
"affected": [],
"aliases": [
"CVE-2022-27563"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-30T22:15:00Z",
"severity": "HIGH"
},
"details": "An unauthenticated user can overload a part of HCL VersionVault Express and cause a denial of service.",
"id": "GHSA-xc8c-x7j7-pr89",
"modified": "2022-09-07T00:01:53Z",
"published": "2022-08-31T00:00:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-27563"
},
{
"type": "WEB",
"url": "https://support.hcltechsw.com/csm?id=kb_article\u0026sysparm_article=KB0100274"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XCCF-8V88-53M7
Vulnerability from github – Published: 2025-04-03 15:31 – Updated: 2026-06-26 00:31A flaw was found in libsoup. The libsoup soup_uri_decode_data_uri() function may crash when processing malformed data URI. This flaw allows an attacker to cause a denial of service (DoS).
{
"affected": [],
"aliases": [
"CVE-2025-32051"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-03T14:15:43Z",
"severity": "MODERATE"
},
"details": "A flaw was found in libsoup. The libsoup soup_uri_decode_data_uri() function may crash when processing malformed data URI. This flaw allows an attacker to cause a denial of service (DoS).",
"id": "GHSA-xccf-8v88-53m7",
"modified": "2026-06-26T00:31:59Z",
"published": "2025-04-03T15:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32051"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2025-32051"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2357068"
},
{
"type": "WEB",
"url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/401"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-XCPR-7MR4-H4XQ
Vulnerability from github – Published: 2024-11-18 12:30 – Updated: 2025-11-03 21:31Unchecked Error Condition vulnerability in Apache Tomcat. If Tomcat is configured to use a custom Jakarta Authentication (formerly JASPIC) ServerAuthContext component which may throw an exception during the authentication process without explicitly setting an HTTP status to indicate failure, the authentication may not fail, allowing the user to bypass the authentication process. There are no known Jakarta Authentication components that behave in this way.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M26, from 10.1.0-M1 through 10.1.30, from 9.0.0-M1 through 9.0.95. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100.
Users are recommended to upgrade to version 11.0.0, 10.1.31 or 9.0.96, which fix the issue.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.tomcat:tomcat-catalina"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "9.0.96"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "org.apache.tomcat:tomcat-catalina"
},
"ranges": [
{
"events": [
{
"introduced": "10.1.0-M1"
},
{
"fixed": "10.1.30"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 11.0.0-M26"
},
"package": {
"ecosystem": "Maven",
"name": "org.apache.tomcat:tomcat-catalina"
},
"ranges": [
{
"events": [
{
"introduced": "11.0.0-M1"
},
{
"fixed": "11.0.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-52316"
],
"database_specific": {
"cwe_ids": [
"CWE-391",
"CWE-754"
],
"github_reviewed": true,
"github_reviewed_at": "2024-11-18T23:48:03Z",
"nvd_published_at": "2024-11-18T12:15:18Z",
"severity": "CRITICAL"
},
"details": "Unchecked Error Condition vulnerability in Apache Tomcat. If Tomcat is configured to use a custom Jakarta Authentication (formerly JASPIC)\u00a0ServerAuthContext component which may throw an exception during the authentication process without explicitly setting an HTTP status to indicate failure, the authentication may not fail, allowing the user to bypass the authentication process. There are no known Jakarta\u00a0Authentication components that behave in this way.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.0-M26, from 10.1.0-M1 through 10.1.30, from 9.0.0-M1 through 9.0.95. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100.\n\nUsers are recommended to upgrade to version 11.0.0, 10.1.31 or 9.0.96, which fix the issue.",
"id": "GHSA-xcpr-7mr4-h4xq",
"modified": "2025-11-03T21:31:37Z",
"published": "2024-11-18T12:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-52316"
},
{
"type": "WEB",
"url": "https://github.com/apache/tomcat/commit/6d097a66746635df6880fe7662a792156b0eca14"
},
{
"type": "WEB",
"url": "https://github.com/apache/tomcat/commit/7532f9dc4a8c37ec958f79dc82c4924a6c539223"
},
{
"type": "WEB",
"url": "https://github.com/apache/tomcat/commit/acc2f01395f895980f5d8a64573fcc1bade13369"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/tomcat"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread/lopzlqh91jj9n334g02om08sbysdb928"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00009.html"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20250124-0003"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2024/11/18/2"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "Apache Tomcat - Authentication Bypass"
}
GHSA-XH23-4X72-VC94
Vulnerability from github – Published: 2025-12-03 21:31 – Updated: 2025-12-03 21:31NVIDIA Triton Inference Server contains a vulnerability where an attacker may cause an improper check for unusual or exceptional conditions issue by sending extra large payloads. A successful exploit of this vulnerability may lead to denial of service.
{
"affected": [],
"aliases": [
"CVE-2025-33201"
],
"database_specific": {
"cwe_ids": [
"CWE-754"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-03T19:15:55Z",
"severity": "HIGH"
},
"details": "NVIDIA Triton Inference Server contains a vulnerability where an attacker may cause an improper check for unusual or exceptional conditions issue by sending extra large payloads. A successful exploit of this vulnerability may lead to denial of service.",
"id": "GHSA-xh23-4x72-vc94",
"modified": "2025-12-03T21:31:04Z",
"published": "2025-12-03T21:31:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-33201"
},
{
"type": "WEB",
"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5734"
},
{
"type": "WEB",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-33201"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-3
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Choose languages with features such as exception handling that force the programmer to anticipate unusual conditions that may generate exceptions. Custom exceptions may need to be developed to handle unusual business-logic conditions. Be careful not to pass sensitive exceptions back to the user (CWE-209, CWE-248).
Mitigation
Check the results of all functions that return a value and verify that the value is expected.
Mitigation
If using exception handling, catch and throw specific exceptions instead of overly-general exceptions (CWE-396, CWE-397). Catch and handle exceptions as locally as possible so that exceptions do not propagate too far up the call stack (CWE-705). Avoid unchecked or uncaught exceptions where feasible (CWE-248).
Mitigation MIT-39
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
- Exposing additional information to a potential attacker in the context of an exceptional condition can help the attacker determine what attack vectors are most likely to succeed beyond DoS.
Mitigation MIT-5
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-38
If the program must fail, ensure that it fails gracefully (fails closed). There may be a temptation to simply let the program fail poorly in cases such as low memory conditions, but an attacker may be able to assert control before the software has fully exited. Alternately, an uncontrolled failure could cause cascading problems with other downstream components; for example, the program could send a signal to a downstream process so the process immediately knows that a problem has occurred and has a better chance of recovery.
Mitigation
Use system limits, which should help to prevent resource exhaustion. However, the product should still handle low resource conditions since they may still occur.
No CAPEC attack patterns related to this CWE.