The product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions.
Volume of CVEs assigned to CWE-253 and their average CVSS base score over time.
Top CVEs that have been assigned this CWE. A single CVE can have multiple CWE assignments, though many have just one.
23 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-53090HIGH In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix ld_{abs,ind} failure path analysis in subprogs
Usage of ld_{abs,ind} instructions got extended into s | Jun 24, 2026 | 7.8 | 32 | NO | NO |
CVE-2026-46419HIGH Yubico webauthn-server-core (aka java-webauthn-server) 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation. | May 14, 2026 | 7.5 | 30 | NO | NO |
CVE-2017-7474CRITICAL It was found that the Keycloak Node.js adapter 2.5 - 3.0 did not handle invalid tokens correctly. An attacker could use this flaw to bypass authentication and gain access to restr | May 12, 2017 | 9.8 | 30 | NO | NO |
CVE-2026-5818HIGH Incorrect check of function return value in Caliptra Core Runtime Firmware (ActivateFirmwareCmd::activate_fw modules) allows bypass of Caliptra Core's verification of the MCU FW du | Jun 24, 2026 | 7.2 | 29 | NO | NO |
CVE-2026-35091HIGH A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a spe | Apr 1, 2026 | 8.2 | 29 | NO | NO |
CVE-2023-4501CRITICAL User authentication with username and password credentials is ineffective in OpenText (Micro Focus) Visual COBOL, COBOL Server, Enterprise Developer, and Enterprise Server (includi | Sep 12, 2023 | 9.8 | 27 | NO | NO |
CVE-2025-54090MEDIUM A bug in Apache HTTP Server 2.4.64 results in all "RewriteCond expr ..." tests evaluating as "true".
Users are recommended to upgrade to version 2.4.65, which fixes the issue. | Jul 23, 2025 | 6.3 | 26 | NO | NO |
CVE-2023-52040CRITICAL An issue discovered in TOTOLINK X6000R v9.4.0cu.852_B20230719 allows attackers to run arbitrary commands via the sub_41284C function. | Jan 24, 2024 | 9.8 | 26 | NO | NO |
CVE-2025-57767HIGH Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header | Aug 28, 2025 | 7.5 | 25 | NO | NO |
CVE-2023-49286HIGH Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack | Dec 4, 2023 | 7.5 | 25 | NO | NO |
Exploit activity across CVEs assigned to this CWE, including CVEs that carry other CWE assignments.
Social posts that mention CVE IDs assigned to this CWE. This is assigned-CVE activity, not mentions of the CWE label itself.
Media articles that mention CVE IDs assigned to this CWE. This is assigned-CVE coverage, not mentions of the CWE label itself.