Is CVE-2010-4764 in the CISA KEV catalog?

No. CVE-2010-4764 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2010-4764?

CVE-2010-4764 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2010-4764?

CVE-2010-4764 has an EPSS score of 1.47% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2010-4764?

Upgrade otrs2 on debian 11 to 2.4.10+dfsg1-1 or later.

CVE & CISA-KEV Catalog

CVE-2010-4764

MEDIUMEPSS 71th pctl

5.0

CVSS v2

NVD

Description

Open Ticket Request System (OTRS) before 2.4.10, and 3.x before 3.0.3, does not present warnings about incoming encrypted e-mail messages that were based on revoked PGP or GPG keys, which makes it easier for remote attackers to spoof e-mail communication by leveraging a key that has a revocation signature.

CWE-255

How to fix

Remediation Available

otrs2Debian

Fixed in:2.4.10+dfsg1-1CVE-2010-4764

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

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.47%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-255 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2010-0219	High	10.0	90%	-	-
CVE-2013-4786	High	7.5	82%	-	-
CVE-2014-9195	High	10.0	81%	-	-
CVE-2009-3548	High	7.5	79%	-	-
CVE-2009-4189	High	10.0	79%	-	-
CVE-2017-8229	Critical	9.8	74%	-	-

Embed a live status badge for CVE-2010-4764

Markdown

[![CVE-2010-4764](https://tridentstack.com/cve/badge/CVE-2010-4764.svg)](https://tridentstack.com/cve/CVE-2010-4764)

HTML

<a href="https://tridentstack.com/cve/CVE-2010-4764"><img src="https://tridentstack.com/cve/badge/CVE-2010-4764.svg" alt="CVE-2010-4764"></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 2026-04-29.