CVE-2018-0147

Name: CVE-2018-0147
Creator: NVD / NIST
Published: 2018-03-08T07:29:00.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 18.55%

Last modified Jun 17, 2026

CVE-2018-0147 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. CISA has confirmed active exploitation in the wild. EPSS estimates a 18.55% chance of exploitation in the next 30 days.

Description

A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unauthenticated, remote attacker to execute arbitrary commands on an affected device. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object. An exploit could allow the attacker to execute arbitrary commands on the device with root privileges. Cisco Bug IDs: CSCvh25988.

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

18.55%

96.9th 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 Apr 15, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Secure Access Control System	5.2\(0.3\)

References

http://www.securityfocus.com/bid/103328Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040463Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-acs2Vendor Advisory
http://www.securityfocus.com/bid/103328Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040463Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-acs2Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0147US Government Resource

Timeline

Published: Mar 8, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-0147?

How severe is CVE-2018-0147?

CVE-2018-0147 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 18.55% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-0147?

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-2018-0147?

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

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Source: NVD / NIST