CVE-2018-0315

Name: CVE-2018-0315
Creator: NVD / NIST
Published: 2018-06-07T12:29:00.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 8.07%

Last modified Jun 17, 2026

CVE-2018-0315 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in the authentication, authorization, and accounting (AAA) security services of Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect memory operations that the affected software performs when the software parses a username during login authentication. EPSS estimates a 8.07% chance of exploitation in the next 30 days.

Description

A vulnerability in the authentication, authorization, and accounting (AAA) security services of Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect memory operations that the affected software performs when the software parses a username during login authentication. An attacker could exploit this vulnerability by attempting to authenticate to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device or cause the affected device to reload, resulting in a DoS condition. This vulnerability affects Cisco devices that are running Cisco IOS XE Software Release Fuji 16.7.1 or Fuji 16.8.1 and are configured to use AAA for login authentication. Cisco Bug IDs: CSCvi25380.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

8.07%

94.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	16.7.1
Cisco	Ios Xe	16.8.1

References

http://www.securityfocus.com/bid/104410Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041086Broken Link, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-aaaVendor Advisory
http://www.securityfocus.com/bid/104410Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041086Broken Link, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-aaaVendor Advisory

Timeline

Published: Jun 7, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-0315?

How severe is CVE-2018-0315?

CVE-2018-0315 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.07% probability of exploitation in the next 30 days.

How do I fix CVE-2018-0315?

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-2018-0315?

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

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Source: NVD / NIST