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-2017-16938

25
FAUCET Score

CVE-2017-16938 describes a global buffer overflow vulnerability in OptiPNG version 0.7.6, specifically within the LZWReadByte function of the gifread.c file. This flaw allows remote attackers to trigger a denial-of-service or achieve other unspecified impacts by processing a specially crafted GIF file. With a CVSS score of 7.8 (High), successful exploitation requires user interaction and could lead to high confidentiality, integrity, and availability impacts. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.7.6CPE matchmatch criteria
cpe:2.3:a:optipng_project:optipng:0.7.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.79%
Probability of exploitation in next 30 days
EPSS Percentile
76.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0179 is in the 75th percentile among its peer group of 11,616 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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 (1)

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

Vendor Advisories (1)

redhatCVE-2017-16938Low

optipng: global buffer overflow in gifread.c:LZWReadByte when parsing malicious GIF

Nov 24, 2017

References

lists.debian.org / debian-lts-announce/2017/11/msg00042.html
security.gentoo.org / glsa/201801-02
sourceforge.net / p/optipng/bugs/69
PatchThird Party Advisory
debian.org / security/2017/dsa-4058