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CVE-2018-0158

Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability

Published Mar 28, 2018 · updated Jun 16, 2026 · cisco ios

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition. Cisco Bug IDs: CSCvf22394.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 28, 2018 · Catalog

    Detected

    A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sen

  2. Mar 3, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Mar 17, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sen

Required action

Apply updates per vendor instructions.

CISA due date Mar 17, 2022

Affected

  • cpe cisco/ios15.5\(3\)s1.1
  • cpe cisco/ios15.5\(3\)s1.10
  • cpe cisco/ios15.5\(3\)s1.2
  • cpe cisco/ios15.5\(3\)s1.4
  • cpe cisco/ios15.5\(3\)s1.5
  • cpe cisco/ios15.5\(3\)s1.7
  • cpe cisco/ios15.5\(3\)s1.8
  • cpe cisco/ios15.5\(3\)s1.9
  • cpe cisco/ios xe15.5\(3\)s1.1
  • vendor Cisco IOS Software and Cisco IOS XE Softwareversion unspecified

Sources

  • CISA KEVCVE-2018-0158

    A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial-of-service (DoS) condition.

    cisa.gov
  • CVE.orgCVE-2018-0158

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2018-0158

    30-day exploitation probability 7.2%

    first.org
  • NIST NVDCVE-2018-0158

    A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vu

    nvd.nist.gov

References