What’s Vulnerable › Vulnerabilities

CVE-2019-12653: Cisco IOS XE Software Raw Socket Transport Denial of Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-25 · updated 2026-06-17
• Weakness: CWE-20

Description

A vulnerability in the Raw Socket Transport feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper parsing of Raw Socket Transport payloads. An attacker could exploit this vulnerability by establishing a TCP session and then sending a malicious TCP segment via IPv4 to an affected device. This cannot be exploited via IPv6, as the Raw Socket Transport feature does not support IPv6 as a network layer protocol.

Affected products

• Cisco IOS XE: 16.9, 16.10.1

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-rawtcp-dos
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-rawtcp-dos

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