What’s Vulnerable › Vulnerabilities

CVE-2018-0154: Cisco IOS Software Integrated Services Module for VPN Denial-of-Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-03-03
• EPSS: 7.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-28 · updated 2026-06-17
• Weakness: CWE-399

Description

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.

Affected products

• Cisco IOS: all versions

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
• 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

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