TI-2013-05739 Aliases CVE-2013-6979 GHSA-rvr7-79c9-w4jr

The VTY authentication implementation in Cisco IOS XE 03.02.xxSE and 03.03.xxSE…

LOW 31CWE-287Published 2013-12-23 · Updated 2024-08-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: Complete · None · None
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

EPSS 0.03602 89th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios_xe:-:::::::*	not specified by NVD	Vulnerable	Cisco

cpe:2.3:o:cisco:ios_xe:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2013-6979
2026-10-03 Alias added: GHSA-rvr7-79c9-w4jr

References

Advisory 1

20131223 Cisco IOS XE Software Telnet Authentication Bypass Vulnerability

Other 1

101351

TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
TI-2018-00122 Memory corruption in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8

See all 561 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences