Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2016-2572

26
FAUCET Score

CVE-2016-2572 describes a denial-of-service vulnerability in Squid 4.x before version 4.0.7. Remote HTTP servers can trigger an assertion failure and daemon exit by sending a malformed response, exploiting Squid's reliance on HTTP status codes after a parsing failure. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a network-exploitable issue with low attack complexity and high impact on availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.0.1CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:4.0.1:*:*:*:*:*:*:*
4.0.2CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:4.0.2:*:*:*:*:*:*:*
4.0.3CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:4.0.3:*:*:*:*:*:*:*
4.0.4CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:4.0.4:*:*:*:*:*:*:*
4.0.5CPE matchmatch criteria
cpe:2.3:a:squid-cache:squid:4.0.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
10.15%
Probability of exploitation in next 30 days
EPSS Percentile
95.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1015 is in the 92nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: squid-7:3.5.20-2.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: squid
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: squid
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: squid34

Vendor Advisories (1)

redhatCVE-2016-2572Moderate

squid: wrong error handling for malformed HTTP responses

Feb 24, 2016

References

lists.opensuse.org / opensuse-security-announce/2016-08/msg00010.html
lists.opensuse.org / opensuse-security-announce/2016-08/msg00040.html
lists.opensuse.org / opensuse-updates/2016-08/msg00069.html
rhn.redhat.com / errata/RHSA-2016-2600.html
security.gentoo.org / glsa/201607-01
openwall.com / lists/oss-security/2016/02/26/2
securitytracker.com / id/1035101
squid-cache.org / Advisories/SQUID-2016_2.txt
Vendor Advisory
squid-cache.org / Versions/v4/changesets/squid-4-14548.patch
Vendor Advisory