Is CVE-2021-26252 in the CISA KEV catalog?

No. CVE-2021-26252 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26252?

CVE-2021-26252 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-26252?

CVE-2021-26252 has an EPSS score of 0.92% (56th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26252?

Upgrade htmldoc on debian 11 to 1.9.11-4 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-26252

HIGH

7.8

CVSS v3

NVD

Description

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.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

htmldocDebian

Fixed in:1.9.11-4CVE-2021-26252

htmldocUbuntu

Fixed in:1.8.27-8ubuntu1+esm3USN-7189-1

Fixed in:1.8.27-8ubuntu1.1+esm2USN-7189-1

Fixed in:1.9.2-1ubuntu0.2+esm1USN-7189-1

Fixed in:1.9.7-1ubuntu0.3+esm1USN-7189-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.92%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

Embed a live status badge for CVE-2021-26252

Markdown

[![CVE-2021-26252](https://tridentstack.com/cve/badge/CVE-2021-26252.svg)](https://tridentstack.com/cve/CVE-2021-26252)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-26252"><img src="https://tridentstack.com/cve/badge/CVE-2021-26252.svg" alt="CVE-2021-26252"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.