What’s Vulnerable › Vulnerabilities

CVE-2022-20692: Cisco IOS XE Software NETCONF Over SSH Denial of Service Vulnerability

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-15 · updated 2026-06-17
• Weakness: CWE-400

Description

A vulnerability in the NETCONF over SSH feature of Cisco IOS XE Software could allow a low-privileged, authenticated, remote attacker to cause a denial of service condition (DoS) on an affected device. This vulnerability is due to insufficient resource management. An attacker could exploit this vulnerability by initiating a large number of NETCONF over SSH connections. A successful exploit could allow the attacker to exhaust resources, causing the device to reload and resulting in a DoS condition on an affected device.

Affected products

• Cisco IOS XE: 3.15.1xbs, 3.15.2xbs, 16.3.1, 16.3.1a, 16.3.2, 16.3.3 (+121)

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ncossh-dos-ZAkfOdq8
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ncossh-dos-ZAkfOdq8

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