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

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

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.