What is CVE-2021-23206?

CVE-2021-23206 is a high-severity vulnerability in Htmldoc Project, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2022-03-02.

How severe is CVE-2021-23206?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Htmldoc Project

CVE-2021-23206

A flaw was found in htmldoc in v1.9.12 and prior. A stack buffer overflow in parse_table() in ps-pdf.cxx may lead to execute arbitrary code and denial of service.

Vulnerability class: Buffer Overflow

Published 2022-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (72.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Htmldoc Project
Htmldoc — versions Affects v1.9.12 and prior, Fixed in v1.9.12+

Weakness classification (CWE)

References

github.com/michaelrsweet/htmldoc/issues/416 (Exploit, Third Party Advisory, Issue Tracking)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
ubuntu.com/security/CVE-2021-23206 (Third Party Advisory)
github.com/michaelrsweet/htmldoc/commit/ba61a3ece382389ae4482c7027af8b32e8ab4cc8 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-23206?: CVE-2021-23206 is a high-severity vulnerability in Htmldoc Project, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2022-03-02.
How severe is CVE-2021-23206?: High severity. CVSS v3 base score is 7.8 out of 10.