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CVE-2016-6223

25
FAUCET Score

CVE-2016-6223 describes a critical vulnerability in libtiff versions prior to 4.0.7, specifically within the TIFFReadRawStrip1 and TIFFReadRawTile1 functions. This flaw allows remote attackers to trigger a denial of service or potentially extract sensitive information by exploiting a negative index in a file-content buffer. With a CVSS score of 9.1 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to high confidentiality and availability impacts. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.6CPE matchmatch criteria
cpe:2.3:a:libtiff:libtiff:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.27%
Probability of exploitation in next 30 days
EPSS Percentile
87.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0327 is in the 79th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libtiff
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libtiff

Vendor Advisories (1)

redhatCVE-2016-6223Moderate

libtiff: Out-of-bounds read on memory-mapped files in TIFFReadRawStrip1() and TIFFReadRawTile1()

Jul 10, 2016

References

libtiff.maptools.org / v4.0.7.html
Patch
security.gentoo.org / glsa/201701-16
debian.org / security/2017/dsa-3762
openwall.com / lists/oss-security/2016/07/13/3
Mailing List
openwall.com / lists/oss-security/2016/07/14/4
Mailing List
securityfocus.com / bid/91741