CVE-2025-20174

A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper error handling when parsing SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.  This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMP v2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMP v3, the attacker must have valid SNMP user credentials for the affected system.

• cisco ios 15.2\(1\)sy • cisco ios 15.2\(1\)sy0a • cisco ios 15.2\(1\)sy1 • cisco ios 15.2\(1\)sy1a • cisco ios 15.2\(1\)sy2 • cisco ios 15.2\(1\)sy3 • cisco ios 15.2\(1\)sy4 • cisco ios 15.2\(1\)sy5 • cisco ios 15.2\(1\)sy6 • cisco ios 15.2\(1\)sy7 • cisco ios 15.2\(1\)sy8 • cisco ios 15.2\(2\)sy • cisco ios 15.2\(2\)sy1 • cisco ios 15.2\(2\)sy2 • cisco ios 15.2\(2\)sy3 • cisco ios 15.3\(1\)sy • cisco ios 15.3\(1\)sy1 • cisco ios 15.3\(1\)sy2 • cisco ios 15.4\(1\)cg • cisco ios 15.4\(1\)cg1 • cisco ios 15.4\(1\)s • cisco ios 15.4\(1\)s1 • cisco ios 15.4\(1\)s2 • cisco ios 15.4\(1\)s3 • cisco ios 15.4\(1\)s4 • cisco ios 15.4\(1\)sy • cisco ios 15.4\(1\)sy1 • cisco ios 15.4\(1\)sy2 • cisco ios 15.4\(1\)sy3 • cisco ios 15.4\(1\)sy4 • cisco ios 15.4\(1\)t • cisco ios 15.4\(1\)t1 • cisco ios 15.4\(1\)t2 • cisco ios 15.4\(1\)t3 • cisco ios 15.4\(1\)t4 • cisco ios 15.4\(2\)cg • cisco ios 15.4\(2\)s • cisco ios 15.4\(2\)s1 • cisco ios 15.4\(2\)s2 • cisco ios 15.4\(2\)s3 • cisco ios 15.4\(2\)s4 • cisco ios 15.4\(2\)t • cisco ios 15.4\(2\)t1 • cisco ios 15.4\(2\)t2 • cisco ios 15.4\(2\)t3 • cisco ios 15.4\(2\)t4 • cisco ios 15.4\(3\)s • cisco ios 15.4\(3\)s1 • cisco ios 15.4\(3\)s2 • cisco ios 15.4\(3\)s3 • cisco ios 15.4\(3\)s4 • cisco ios 15.4\(3\)s5 • cisco ios 15.4\(3\)s6 • cisco ios 15.4\(3\)s6a • cisco ios 15.4\(3\)s7 • cisco ios 15.4\(3\)s8 • cisco ios 15.4\(3\)s9 • cisco ios 15.4\(3\)s10 • cisco ios 15.5\(1\)s • cisco ios 15.5\(1\)s1 … and 418 more