Is CVE-2013-4548 being actively exploited?

CVE-2013-4548 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-4548?

CVE-2013-4548 has a CVSS 2.0 base score of 6.0 (MEDIUM).

CVE-2013-4548

MEDIUM · CVSS 6.0EPSS 2.7%EU EUVD

The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.

Key facts

CVSS score: 6.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:S/C:P/I:P/A:P
Weakness (CWE): CWE-264
EPSS score: 2.7% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-4407)
Published: November 8, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-4407 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

openbsd / openssh
openbsd / openssh

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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