What is CVE-2021-26252?

CVE-2021-26252 is a high-severity vulnerability in Htmldoc Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-24.

How severe is CVE-2021-26252?

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

Buffer overflow in Htmldoc Project

CVE-2021-26252

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

Vulnerability class: Buffer Overflow

Published 2022-02-24 · 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: 0.010 (60.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Htmldoc Project — versions 1.9.12
Fedoraproject Fedora — versions 34
Red Hat Enterprise Linux — versions 7.0
Htmldoc — versions htmldoc 1.9.15

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2021-26252?: CVE-2021-26252 is a high-severity vulnerability in Htmldoc Project, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-02-24.
How severe is CVE-2021-26252?: High severity. CVSS v3 base score is 7.8 out of 10.