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CVE-2016-9623

18
FAUCET Score

CVE-2016-9623 describes a denial-of-service vulnerability in the Tatsuya Kinoshita w3m fork before version 0.5.3-33. Remote attackers can trigger a segmentation fault and crash the w3m browser by enticing a user to open a specially crafted HTML page. With a CVSS v3.0 score of 6.5 (Medium), this vulnerability requires user interaction (UI:R) but can be exploited over the network (AV:N) with low attack complexity (AC:L), leading to high availability impact (A:H). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.3-32CPE matchmatch criteria
cpe:2.3:a:tats:w3m:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.77%
Probability of exploitation in next 30 days
EPSS Percentile
75.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0177 is in the 87th percentile among its peer group of 26,220 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: w3m
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: w3m

Vendor Advisories (1)

redhatCVE-2016-9623Low

w3m: Integer overflow resulting in segmentation fault

Nov 6, 2016

References

github.com / tats/w3m/blob/master/ChangeLog
Issue TrackingPatch
github.com / tats/w3m/issues/33
Issue TrackingPatch
openwall.com / lists/oss-security/2016/11/24/1
Mailing ListThird Party Advisory