CVE-2026-22904: wago 0852-1322_firmware Stack-based Buffer Overflow

Vulnerability summary

CVE-2026-22904 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in wago 0852-1322_firmware. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.4% of scored vulnerabilities.

Timeline

1. 09-02-2026
   PublishedVulnerability first disclosed.
2. 09-02-2026
   Last modifiedVulnerability information updated.

Description

Improper length handling when parsing multiple cookie fields (including TRACKID) allows an unauthenticated remote attacker to send oversized cookie values and trigger a stack buffer overflow, resulting in a denial‑of‑service condition and possible remote code execution.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).