CVE-2018-15377

Name: CVE-2018-15377
Creator: NVD / NIST
Published: 2018-10-05T14:29:06.887+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.59%

Last modified Jun 17, 2026

CVE-2018-15377 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the Cisco Network Plug and Play agent, also referred to as the Cisco Open Plug-n-Play agent, of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. The vulnerability is due to insufficient input validation by the affected software. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

A vulnerability in the Cisco Network Plug and Play agent, also referred to as the Cisco Open Plug-n-Play agent, of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. The vulnerability is due to insufficient input validation by the affected software. An attacker could exploit this vulnerability by sending invalid data to the Cisco Network Plug and Play agent on an affected device. A successful exploit could allow the attacker to cause a memory leak on the affected device, which could cause the device to reload.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability

1.59%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios	15.7\(3.1s\)m
Cisco	Ios	denali-16.3.6
Cisco	Ios	everest-16.5.1

References

https://ics-cert.us-cert.gov/advisories/ICSA-19-094-02Third Party Advisory, US Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-pnp-memleakVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-19-094-02Third Party Advisory, US Government Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180926-pnp-memleakVendor Advisory

Timeline

Published: Oct 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-15377?

How severe is CVE-2018-15377?

CVE-2018-15377 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2018-15377?

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-2018-15377?

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

Scan your code now

Source: NVD / NIST