Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CWE-391

Unchecked Error Condition

[PLANNED FOR DEPRECATION. SEE MAINTENANCE NOTES AND CONSIDER CWE-252, CWE-248, OR CWE-1069.] Ignoring exceptions and other error conditions may allow an attacker to induce unexpected behavior unnoticed.

24
Assigned CVEs
311th
Commonality Rank
8.5
Avg CVSS
0.0%
In CISA KEV

Volume and Severity of Assigned CVEs Over Time

Volume of CVEs assigned to CWE-391 and their average CVSS base score over time.

Volume of CVEsAvg CVSS Base Score
First CVE
Jun 26, 2017
9 years ago
Most Recent CVE
Jun 17, 2026
37 days ago

Top CVEs Assigned This CWE

Top CVEs that have been assigned this CWE. A single CVE can have multiple CWE assignments, though many have just one.

24 CVEs · Highest risk first

CVEPublishedCVSSRiskKEVExploit
CVE-2024-52316CRITICAL
Unchecked Error Condition vulnerability in Apache Tomcat. If Tomcat is configured to use a custom Jakarta Authentication (formerly JASPIC) ServerAuthContext component which may thr
Nov 18, 20249.834NONO
CVE-2025-71325CRITICAL
picklescan before 0.0.27 contains a parsing logic error in the _list_globals function when handling STACK_GLOBAL opcodes, failing to track arguments in the correct range and allowi
Jun 17, 20269.833NONO
CVE-2017-12180CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in XFree86 VidModeExtension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.831NONO
CVE-2017-12186CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in X-Resource extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.829NONO
CVE-2017-12185CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in MIT-SCREEN-SAVER extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.828NONO
CVE-2017-12183CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in XFIXES extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.828NONO
CVE-2017-12182CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in XFree86 DRI extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.828NONO
CVE-2017-12181CRITICAL
xorg-x11-server before 1.19.5 was missing length validation in XFree86 DGA extension allowing malicious X client to cause X server to crash or possibly execute arbitrary code.
Jan 24, 20189.828NONO
CVE-2017-12178CRITICAL
xorg-x11-server before 1.19.5 had wrong extra length check in ProcXIChangeHierarchy function allowing malicious X client to cause X server to crash or possibly execute arbitrary co
Jan 24, 20189.828NONO
CVE-2017-12177CRITICAL
xorg-x11-server before 1.19.5 was vulnerable to integer overflow in ProcDbeGetVisualInfo function allowing malicious X client to cause X server to crash or possibly execute arbitra
Jan 24, 20189.828NONO
View all 24 CVEs →

CVE Severity & Scoring

This CWEGlobal (All CVEs)
0.0-0.9
1.0-1.9
2.0-2.9
3.0-3.9
10%
4.0-4.9
13%
19%
5.0-5.9
13%
16%
6.0-6.9
8%
26%
7.0-7.9
8%
11%
8.0-8.9
58%
14%
9.0-10.0
unknown
CVSS Score Range

Exploit Exposure

Exploit activity across CVEs assigned to this CWE, including CVEs that carry other CWE assignments.

CISA KEV
0 CVEs
0.0% of CVEs· Bottom 1%
Metasploit
0 CVEs
0.0% of CVEs· Bottom 1%
Nuclei
0 CVEs
0.0% of CVEs· Bottom 1%
ExploitDB
0 CVEs
0.0% of CVEs· Bottom 1%

Social Chatter

Social posts that mention CVE IDs assigned to this CWE. This is assigned-CVE activity, not mentions of the CWE label itself.

Media Mentions

Media articles that mention CVE IDs assigned to this CWE. This is assigned-CVE coverage, not mentions of the CWE label itself.

Top Affected Vendors

Top Affected Products