CVE-2018-0123

Name: CVE-2018-0123
Creator: NVD / NIST
Published: 2018-02-08T07:29:00.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.41%

Last modified Jun 17, 2026

CVE-2018-0123 is a vulnerability of currently unknown severity. A Path Traversal vulnerability in the diagnostic shell for Cisco IOS and IOS XE Software could allow an authenticated, local attacker to use certain diagnostic shell commands that can overwrite system files. These system files may be sensitive and should not be able to be overwritten by a user of the diagnostic shell. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

A Path Traversal vulnerability in the diagnostic shell for Cisco IOS and IOS XE Software could allow an authenticated, local attacker to use certain diagnostic shell commands that can overwrite system files. These system files may be sensitive and should not be able to be overwritten by a user of the diagnostic shell. The vulnerability is due to lack of proper input validation for certain diagnostic shell commands. An attacker could exploit this vulnerability by authenticating to the device, entering the diagnostic shell, and providing crafted user input to commands at the local diagnostic shell CLI. Successful exploitation could allow the attacker to overwrite system files that should be restricted. Cisco Bug IDs: CSCvg41950.

Metrics

EPSS Probability

0.41%

33.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios	16.7\(1\)
Cisco	Ios Xe	All versions

References

http://www.securityfocus.com/bid/102967Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040346Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-iosVendor Advisory
http://www.securityfocus.com/bid/102967Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040346Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180207-iosVendor Advisory

Timeline

Published: Feb 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0123?

How severe is CVE-2018-0123?

Severity scoring for CVE-2018-0123 is pending analysis. The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0123?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-0123?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST