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Findings

CVE-2018-0147

Cisco Secure Access Control System Java Deserialization Vulnerability

Published Mar 8, 2018 · updated Jun 16, 2026 · cisco secure access control system

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.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 8, 2018 · Catalog

    Detected

    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

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Required action

Apply updates per vendor instructions.

CISA due date Apr 15, 2022

Affected

  • cpe cisco/secure access control system5.2\(0.3\)
  • vendor Cisco Secure Access Control System (ACS)version unspecified

Sources

  • CISA KEVCVE-2018-0147

    A vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) 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.gov
  • CVE.orgCVE-2018-0147

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2018-0147

    30-day exploitation probability 18.2%

    first.org
  • NIST NVDCVE-2018-0147

    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-

    nvd.nist.gov

References