CVE-2026-22903

CRITICAL

WAGO 0852-1322 and 0852-1328 < 2.64 - Unauthenticated Stack-based Buffer Overflow via SESSIONID Cookie

Title source: llm

Description

An unauthenticated remote attacker can send a crafted HTTP request containing an overly long SESSIONID cookie. This can trigger a stack buffer overflow in the modified lighttpd server, causing it to crash and potentially enabling remote code execution due to missing stack protections.

References (1)

Core 1

Core References

Various Sources

https://certvde.com/de/advisories/VDE-2026-004

Scores

CVSS v3 9.8

EPSS 0.0067

EPSS Percentile 46.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-121

Status published

Products (4)

WAGO/0852-1322 0.0.0 - 2.64

WAGO/0852-1322 2.64

WAGO/0852-1328 0.0.0 - 2.64

WAGO/0852-1328 2.64

Published Feb 09, 2026

Tracked Since Feb 18, 2026