What is the CVSS score of CVE-2026-22904?

CVE-2026-22904 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

How to fix or mitigate CVE-2026-22904?

Within 24 hours: Identify all affected systems and assess internet exposure; activate WAF rules to block oversized cookie values; establish incident response readiness. Within 7 days: Implement network segmentation to isolate critical systems; deploy monitoring for suspicious cookie patterns; document baseline traffic for anomaly detection. Within 30 days: Coordinate with vendor for patch availability; conduct penetration testing on mitigated systems; review and update incident response procedures specific to this vulnerability.

CVE-2026-22904

CRITICAL

Stack-based Buffer Overflow (CWE-121)

2026-02-09 info@cert.vde.com

RCE Buffer Overflow

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 09, 2026 - 08:16 nvd

CRITICAL 9.8

DescriptionCVE.org

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.