by Kastro
Paper/Archive/CVE-2026-22903

CVE-2026-22903

WAGO 0852-1322 — Stack Overflow via SESSIONID Cookie in lighttpd

EPSS 0.8%CVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 55.3.553 × 2011.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
0852-13220.0.0 – 2.64–CNA
0852-13280.0.0 – 2.64–CNA
0852-13222.64–CNA
0852-13282.64–CNA

Scores by source

CERTVDE (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refcertvde.com/de/advisories/VDE-2026-004