CVE-2018-0158A 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 reloa…
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It affects cisco ios and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 17, 2022. Treat that date as your deadline.
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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.
- CVSS
- 8.6 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Weakness (CWE)
- CWE-20
- Known exploited
- Added to CISA KEV Mar 3, 2022; federal remediation due Mar 17, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 7.19% (percentile 94)
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Jan 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cisco ios cisco:ios | 15.5(3)s1.1; 15.5(3)s1.2; 15.5(3)s1.4; 15.5(3)s1.5; 15.5(3)s1.7; 15.5(3)s1.8; 15.5(3)s1.9; 15.5(3)s1.10; and 12 more ranges | NVD |
cisco ios_xe cisco:ios_xe | 15.5(3)s1.1; 15.5(3)s1.2; 15.5(3)s1.4; 15.5(3)s1.5; 15.5(3)s1.7; 15.5(3)s1.8; 15.5(3)s1.9; 15.5(3)s1.10; and 12 more ranges | NVD |
References
- http://www.securityfocus.com/bid/103566vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03x-refsource-misc, third-party-advisory, us-government-resource, vdb-entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04x-refsource-misc, third-party-advisory, us-government-resource, vdb-entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-ikex-refsource-confirm, vendor-advisory
- http://www.securitytracker.com/id/1040595vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0158us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.