5.4

CVE-2013-6979: cisco ios_xe Improper Authentication

CVSS: 5.4v2.0MediumModified
Published 23-12-2013Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-6979 is a medium (CVSS 5.4) Improper Authentication vulnerability in cisco ios_xe. EPSS estimates a 3.60% chance of exploitation in the next 30 days, higher than 89.3% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v2.0 (NVD)
EPSS score
3.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 23-12-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

3.60%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

0.00 pp

From 3.60% on 21-09-2026

21-09-202621-10-2026
EPSS score
3.60%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco1 product

1 vendor · 1 product

References

5 links