Is CVE-2021-26948 in the CISA KEV catalog?

No. CVE-2021-26948 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26948?

CVE-2021-26948 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-26948?

CVE-2021-26948 has an EPSS score of 0.79% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26948?

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

CVE & CISA-KEV Catalog

CVE-2021-26948

HIGH

7.8

CVSS v3

NVD

Description

Null pointer dereference in the htmldoc v1.9.11 and before may allow attackers to execute arbitrary code and cause a denial of service via a crafted html file.

CWE-479 CWE-476NULL Pointer Dereference

How to fix

Remediation Available

htmldocDebian

Fixed in:1.9.11-4CVE-2021-26948

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

0.79%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Patch1

github.com

Related Vulnerabilities

Other CWE-479 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-44011	High	8.6	0.3%	-	-

Embed a live status badge for CVE-2021-26948

Markdown

[![CVE-2021-26948](https://tridentstack.com/cve/badge/CVE-2021-26948.svg)](https://tridentstack.com/cve/CVE-2021-26948)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-26948"><img src="https://tridentstack.com/cve/badge/CVE-2021-26948.svg" alt="CVE-2021-26948"></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.