CVE-2013-6979

Ios Xe vulnerability

CVSS

5.4

EPSS

3.6%

EPSS pct

88th

Exploited

No known

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 vendor

Cisco

Affected product

Ios Xe

CVSS vector

AV:N/AC:H/Au:N/C:C/I:N/A:N

Weakness type (CWE)

CWE-287 — Improper Authentication

Published

2013-12-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality.

Its EPSS score of 3.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2013-6979

Confirm whether Cisco Ios Xe is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2013-6979.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-6979

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-6979 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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