Is CVE-2011-4862 in the CISA KEV catalog?

No. CVE-2011-4862 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-4862?

CVE-2011-4862 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2011-4862?

CVE-2011-4862 has an EPSS score of 95.10% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2011-4862

HIGHEPSS 100th pctl

10.0

CVSS v2

NVD

Description

Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.2 and earlier, Heimdal 1.5.1 and earlier, GNU inetutils, and possibly other products allows remote attackers to execute arbitrary code via a long encryption key, as exploited in the wild in December 2011.

CWE-120

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

95.10%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

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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 2026-04-29.