Is CVE-2009-0641 in the CISA KEV catalog?

No. CVE-2009-0641 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-0641?

CVE-2009-0641 has a CVSS v2 base score of 9.3 (HIGH).

What is the EPSS score for CVE-2009-0641?

CVE-2009-0641 has an EPSS score of 9.35% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2009-0641?

No published fix for CVE-2009-0641 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2009-0641

HIGHEPSS 95th pctl

9.3

CVSS v2

NVD

Description

sys_term.c in telnetd in FreeBSD 7.0-RELEASE and other 7.x versions deletes dangerous environment variables with a method that was valid only in older FreeBSD distributions, which might allow remote attackers to execute arbitrary code by passing a crafted environment variable from a telnet client, as demonstrated by an LD_PRELOAD value that references a malicious library.

CWE-16 CWE-264Permissions, Privileges, and Access Controls

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

9.35%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Patch1

security.freebsd.org

Exploit2

Other references2

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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 2026-04-23.