Is CVE-2004-0640 in the CISA KEV catalog?

No. CVE-2004-0640 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0640?

CVE-2004-0640 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2004-0640?

CVE-2004-0640 has an EPSS score of 4.49% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2004-0640?

Upgrade netkit-telnet-ssl on debian 11 to 0.17.24+0.1-2 or later.

CVE & CISA-KEV Catalog

CVE-2004-0640

HIGHEPSS 90th pctl

10.0

CVSS v2

NVD

Description

Format string vulnerability in the SSL_set_verify function in telnetd.c for SSLtelnet daemon (SSLtelnetd) 0.13 allows remote attackers to execute arbitrary code.

How to fix

Remediation Available

netkit-telnet-sslDebian

Fixed in:0.17.24+0.1-2CVE-2004-0640

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

4.49%probability of exploitation in 30 days

90thpercentile

High risk: more likely to be exploited than 90% of all known CVEs.

References

Patch1

debian.org

Other references2

Embed a live status badge for CVE-2004-0640

Markdown

[![CVE-2004-0640](https://tridentstack.com/cve/badge/CVE-2004-0640.svg)](https://tridentstack.com/cve/CVE-2004-0640)

HTML

<a href="https://tridentstack.com/cve/CVE-2004-0640"><img src="https://tridentstack.com/cve/badge/CVE-2004-0640.svg" alt="CVE-2004-0640"></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 2026-04-16.