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CVE-2013-6979
The VTY authentication implementation in Cisco IOS XE 03.02.xxSE and 03.03.xxSE incorrectly relies on the Linux-IOS internal-network…
Medium5.4EPSS 3.6%
- Published
- Updated
- Reserved
- Assigned by
- cisco
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.4 | AV:N/AC:H/Au:N/C:C/I:N/A:N |
- EPSS (exploitation in 30 days)
- 3.6% · top 11% of all CVEs (4 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.
Weakness
Affected products
n/a
- affected n/a
References (5)
- cisco-iosxe-cve20136979-sec-bypass(89901) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 1029537 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 101351 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 64502 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20131223 Cisco IOS XE Software Telnet Authentication Bypass Vulnerability (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2013-6979)Record last updated .