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Fencer Intel
medium 6.5

CVE-2016-9436 json

parsetagx.c in w3m before 0.5.3+git20161009 does not properly initialize values, which allows remote attackers to crash the application via…

published 2017-01-20 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10246

cvss
6.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

parsetagx.c in w3m before 0.5.3+git20161009 does not properly initialize values, which allows remote attackers to crash the application via a crafted html file, related to a <i> tag.

Patch / fix

  • w3m Debian 14, Debian 13, Debian 12 0.5.3-30

debian advisories DEBIAN-CVE-2016-9436

  • w3m Ubuntu 14.04 LTS 0.5.3-15ubuntu0.1
  • w3m Ubuntu 16.04 LTS 0.5.3-26ubuntu0.1

ubuntu advisories UBUNTU-CVE-2016-9436

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • w3m SLES for SAP 12 SP2, SLES for SAP 12 SP1, SLES for Raspberry Pi 12 SP2 +4 more 0.5.3.git20161120-160.1
  • w3m SLES for SAP 11 SP4, SLES 11 SP4 0.5.3.git20161120-4.1

suse advisories SUSE-SU-2016:3053-1SUSE-SU-2016:3046-1

  • w3m openSUSE Tumbleweed 0.5.3.git20161120-1.1

opensuse advisories openSUSE-SU-2024:10235-1

  • w3m Arch Linux 0.5.3.git20161031-1

arch linux advisories AVG-73

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9436 updated cvss 4.3

w3m: Unitialised value in parsetagx.c

  • Red Hat Enterprise Linux 5 w3m Red Hat Enterprise Linux 6 w3m, w3m-img
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.34% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.