CVE-2018-0154

Name: CVE-2018-0154
Creator: NVD / NIST
Published: 2018-03-28T22:29:00.373+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10Actively ExploitedEPSS 7.07%

Last modified Jun 17, 2026

CVE-2018-0154 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient handling of VPN traffic by the affected device. CISA has confirmed active exploitation in the wild. EPSS estimates a 7.07% chance of exploitation in the next 30 days.

Description

A vulnerability in the crypto engine of the Cisco Integrated Services Module for VPN (ISM-VPN) running Cisco IOS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient handling of VPN traffic by the affected device. An attacker could exploit this vulnerability by sending crafted VPN traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to hang or crash, resulting in a DoS condition. Cisco Bug IDs: CSCvd39267.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

7.07%

93.4th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 17, 2022.

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Cisco	Ios	All versions

References

http://www.securityfocus.com/bid/103559Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040585Broken Link, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dosVendor Advisory
http://www.securityfocus.com/bid/103559Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040585Broken Link, Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dosVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0154US Government Resource

Timeline

Published: Mar 28, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-0154?

How severe is CVE-2018-0154?

CVE-2018-0154 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 7.07% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-0154?

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-2018-0154?

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

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Source: NVD / NIST