Vulnerability Report

CVE-2016-4052

Title: Squid-Cache Squid RCE

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2016-4052.

CWE Category CWE-119

Published Date Apr 25, 2016

Modified Date Jun 17, 2026

Exploit Status Not Found

Score 8.1 CVSS v3.0

Exploit Probability (EPSS)

12.87%

Vulnerability Summary

CVE-2016-4052: Multiple stack-based buffer overflows in Squid 3.x before 3.5.17 and 4.x before 4.0.9 allow remote HTTP servers to cause a denial of service or execute arbitrary code via crafted Edge Side Includes (ESI) responses.

Impacted Vendors

squid 1

squid-cache 1

Reference Links

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 http://www.openwall.com/lists/oss-security/2016/04/20/9 http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securityfocus.com/bid/86788 http://www.securityfocus.com/bid/91787 http://www.securitytracker.com/id/1035647 http://www.squid-cache.org/Advisories/SQUID-2016_6.txt http://www.ubuntu.com/usn/USN-2995-1 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 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 http://www.openwall.com/lists/oss-security/2016/04/20/9 http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securityfocus.com/bid/86788 http://www.securityfocus.com/bid/91787 http://www.securitytracker.com/id/1035647 http://www.squid-cache.org/Advisories/SQUID-2016_6.txt http://www.ubuntu.com/usn/USN-2995-1 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

CVSS v3.0

Source Entity [email protected]

Severity HIGH

8.1

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

6.8

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-4052 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 17, 2026 MODIFIED

Vulnerability data updated via NVD.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

April 25, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity HIGH

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.