CVE-2013-6979

Severity: medium (CVSS 5.4 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-12-23 · updated 2026-06-17
Weakness: CWE-287

Description

The VTY authentication implementation in Cisco IOS XE 03.02.xxSE and 03.03.xxSE incorrectly relies on the Linux-IOS internal-network configuration, which allows remote attackers to bypass authentication by leveraging access to a 192.168.x.2 source IP address, aka Bug ID CSCuj90227.

Affected products

Cisco IOS XE: all versions

References

http://osvdb.org/101351
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6979
http://www.securityfocus.com/bid/64502
http://www.securitytracker.com/id/1029537
https://exchange.xforce.ibmcloud.com/vulnerabilities/89901
http://osvdb.org/101351
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-6979
http://www.securityfocus.com/bid/64502
http://www.securitytracker.com/id/1029537
https://exchange.xforce.ibmcloud.com/vulnerabilities/89901

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