CVE DATABASE / CVE-2018-0154
CVE-2018-0154
Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability
Confirmed exploited in the wild. Added 2022-03-03.
Federal remediation due 2022-03-17.
Required action: Apply updates per vendor instructions.
Summary
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.
CVSS 3.1 breakdown
| Base score | 7.5 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity | NONE |
| Availability | HIGH |
Weakness type (CWE)
Affected products
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References
- http://www.securityfocus.com/bid/103559
- http://www.securitytracker.com/id/1040585
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dos
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0154
Data: NIST NVD + CISA KEV. NVD last modified 2026-01-13. Always verify against the vendor advisory before acting.