Is CVE-2016-4051 being actively exploited?

CVE-2016-4051 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2016-4051?

CVE-2016-4051 has a CVSS 3.0 base score of 8.8 (HIGH).

CVE-2016-4051

HIGH · CVSS 8.8EPSS 18.3%EU EUVD

Buffer overflow in cachemgr.cgi in Squid 2.x, 3.x before 3.5.17, and 4.x before 4.0.9 might allow remote attackers to cause a denial of service or execute arbitrary code by seeding manager reports with crafted data.

Key facts

CVSS score: 8.8 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 18.3% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2016-5054)
Published: April 25, 2016
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2016-5054 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
oracle / linux
oracle / linux
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid
squid-cache / squid

and 104 more…

Certified products that may be affected

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

Oracle Linux 7 NSS Cryptographic Module - Oracle Corporation - FIPS 140 4586 - historical
Oracle Linux 7 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 4266 - historical
Oracle Linux 7 OpenSSH Client Cryptographic Module - Oracle Corporation - FIPS 140 4206 - historical
Oracle Linux 7 OpenSSH Server Cryptographic Module - Oracle Corporation - FIPS 140 4176 - historical
Oracle Linux 7 Unbreakable Enterprise Kernel (UEK 6) Cryptographic Module - Oracle Corporation - FIPS 140 4169 - historical

See all 25 in the Security Certifications Explorer.

References

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://www.debian.org/security/2016/dsa-3625
http://www.openwall.com/lists/oss-security/2016/04/20/6(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2016/04/20/9(Mailing List, Third Party Advisory)
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html(Patch, Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html(Third Party Advisory)
http://www.securityfocus.com/bid/86788
http://www.securityfocus.com/bid/91787(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1035646(Third Party Advisory, VDB Entry)
http://www.squid-cache.org/Advisories/SQUID-2016_5.txt(Vendor Advisory)
http://www.ubuntu.com/usn/USN-2995-1(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2016:1138
https://access.redhat.com/errata/RHSA-2016:1139
https://access.redhat.com/errata/RHSA-2016:1140
https://security.gentoo.org/glsa/201607-01

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

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain