Is CVE-2016-5408 being actively exploited?

CVE-2016-5408 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2016-5408?

CVE-2016-5408 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2016-5408

CRITICAL · CVSS 9.8EPSS 4.4%EU EUVD

Stack-based buffer overflow in the munge_other_line function in cachemgr.cgi in the squid package before 3.1.23-16.el6_8.6 in Red Hat Enterprise Linux 6 allows remote attackers to execute arbitrary code via unspecified vectors. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-4051.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 4.4% (91th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2016-6353)
Published: August 10, 2016
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2016-6353 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

oracle / linux
redhat / enterprise linux server
redhat / enterprise linux workstation

Certified products that may be affected

6 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Oracle Linux 7 Unbreakable Enterprise Kernel (UEK 6) Cryptographic Module - Oracle Corporation - FIPS 140 4169 - historical
Oracle Linux 6 Kernel Crypto API Cryptographic Module - Oracle Corporation - FIPS 140 3421 - historical
Oracle Linux 6 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 3170 - historical
Oracle Linux 6 NSS Cryptographic Module - Oracle Corporation - FIPS 140 3111 - historical
Oracle Linux 6 OpenSSH Server Cryptographic Module - Oracle Corporation - FIPS 140 3031 - historical

See all 6 in the Security Certifications Explorer.

References

http://rhn.redhat.com/errata/RHSA-2016-1573.html(Patch, Vendor Advisory)
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html(Third Party Advisory)

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

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