Is CVE-2026-55654 actively exploited?

No active exploitation of CVE-2026-55654 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-55654 be exploited remotely?

Yes. CVE-2026-55654 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-55654?

CVE-2026-55654 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-55654

LOW

CVE-2026-55654

CWE-125Published: June 23, 2026· Updated: Jun 25, 2026

3.7

CVSS v3.1

EPSS:0.33%probability of exploitation in 30 daysPercentile:24.9th

Official Description

A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of GSSAPI (Generic Security Service Application Programming Interface) indicators when a trailing NULL termination is missing in the auth-indicators array. A remote attacker, under specific configurations involving GSSAPI authentication and a Kerberos environment, could exploit this to cause the SSH authentication path to crash or abort. This leads to a denial of service (DoS), impacting the availability of the SSH service.

NVD Source

Technical Analysis

CVE-2026-55654 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.