CVE-2026-22903 | An unauthenticated remote attacker can send a crafted HTTP r… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-22903
State: PUBLISHED
Assigner: CERTVDE
Reserved: 2026-01-13 08:33 UTC
Published: 2026-02-09 07:39 UTC
Last updated: 2026-02-09 15:36 UTC
Primary CWE: CWE-121
CWE-121 Stack-based Buffer Overflow
Vendor / Product: WAGO / 0852-1322
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (4)

Vendor	Product	Platform	Versions
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

Weakness (CWE)

CWE	Source	Description
CWE-121	cna	CWE-121 Stack-based Buffer Overflow

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (1)

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