Is CVE-2011-4862 being actively exploited?

CVE-2011-4862 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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

CVE-2011-4862 has a CVSS 2.0 base score of 10.0 (HIGH).

CVE-2011-4862

HIGH · CVSS 10.0EPSS 95.1%EU EUVD

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.

Key facts

CVSS score: 10.0 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-120
EPSS score: 95.1% (100th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-4779)
Published: December 25, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4779 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
debian / debian linux
debian / debian linux
fedoraproject / fedora
fedoraproject / fedora
freebsd / freebsd
gnu / inetutils
heimdal project / heimdal
mit / krb5-appl
opensuse / opensuse
opensuse / opensuse
suse / linux enterprise desktop
suse / linux enterprise desktop
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise software development kit
suse / linux enterprise software development kit

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

SUSE Linux Enterprise Server Version 9 with Service Pack 2, ProPack 4 for Service Pack 2 and certification-sles-sgi-eal3 package - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0292-2005 - archived
SuSE Linux Enterprise Server Version 9 with certification-sles-ibm-eal4 package - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0256-2005 - archived

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html(Broken Link)
http://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=665f1e73cdd9b38e2d2e11b8db9958a315935592(Patch, Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html(Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html(Third Party Advisory)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html(Vendor Advisory)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html(Vendor Advisory)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html(Vendor Advisory)
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html(Vendor Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html(Mailing List, Third Party Advisory)
http://osvdb.org/78020(Broken Link)
http://secunia.com/advisories/46239(Third Party Advisory)
http://secunia.com/advisories/47341(Third Party Advisory)
http://secunia.com/advisories/47348(Third Party Advisory)
http://secunia.com/advisories/47357(Third Party Advisory)
http://secunia.com/advisories/47359(Third Party Advisory)
http://secunia.com/advisories/47373(Third Party Advisory)
http://secunia.com/advisories/47374(Third Party Advisory)
http://secunia.com/advisories/47397(Third Party Advisory)
http://secunia.com/advisories/47399(Third Party Advisory)
http://secunia.com/advisories/47441(Third Party Advisory)
http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc(Mitigation, Vendor Advisory)
http://security.freebsd.org/patches/SA-11:08/telnetd.patch(Patch, Vendor Advisory)
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt(Patch, Vendor Advisory)
http://www.debian.org/security/2011/dsa-2372(Third Party Advisory)
http://www.debian.org/security/2011/dsa-2373(Third Party Advisory)
http://www.debian.org/security/2011/dsa-2375(Third Party Advisory)
http://www.exploit-db.com/exploits/18280/(Exploit, Third Party Advisory, VDB Entry)
http://www.mandriva.com/security/advisories?name=MDVSA-2011:195(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2011-1851.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2011-1852.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2011-1853.html(Third Party Advisory)
http://www.redhat.com/support/errata/RHSA-2011-1854.html(Third Party Advisory)
http://www.securitytracker.com/id?1026460(Third Party Advisory, VDB Entry)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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