CVE-2025-20176

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 15.0\(1\)sy • cisco ios 15.0\(1\)sy1 • cisco ios 15.0\(1\)sy2 • cisco ios 15.0\(1\)sy3 • cisco ios 15.0\(1\)sy4 • cisco ios 15.0\(1\)sy5 • cisco ios 15.0\(1\)sy6 • cisco ios 15.0\(1\)sy7 • cisco ios 15.0\(1\)sy7a • cisco ios 15.0\(1\)sy8 • cisco ios 15.0\(1\)sy9 • cisco ios 15.0\(1\)sy10 • cisco ios 15.0\(2\)ea • cisco ios 15.0\(2\)ea1 • cisco ios 15.0\(2\)ej • cisco ios 15.0\(2\)ej1 • cisco ios 15.0\(2\)ek • cisco ios 15.0\(2\)ek1 • cisco ios 15.0\(2\)ex • cisco ios 15.0\(2\)ex1 • cisco ios 15.0\(2\)ex2 • cisco ios 15.0\(2\)ex3 • cisco ios 15.0\(2\)ex4 • cisco ios 15.0\(2\)ex5 • cisco ios 15.0\(2\)ex8 • cisco ios 15.0\(2\)ex10 • cisco ios 15.0\(2\)ex11 • cisco ios 15.0\(2\)ex12 • cisco ios 15.0\(2\)ex13 • cisco ios 15.0\(2\)ey • cisco ios 15.0\(2\)ey1 • cisco ios 15.0\(2\)ey2 • cisco ios 15.0\(2\)ey3 • cisco ios 15.0\(2\)ez • cisco ios 15.0\(2\)se • cisco ios 15.0\(2\)se1 • cisco ios 15.0\(2\)se2 • cisco ios 15.0\(2\)se3 • cisco ios 15.0\(2\)se4 • cisco ios 15.0\(2\)se5 • cisco ios 15.0\(2\)se6 • cisco ios 15.0\(2\)se7 • cisco ios 15.0\(2\)se8 • cisco ios 15.0\(2\)se9 • cisco ios 15.0\(2\)se10 • cisco ios 15.0\(2\)se10a • cisco ios 15.0\(2\)se11 • cisco ios 15.0\(2\)se12 • cisco ios 15.0\(2\)se13 • cisco ios 15.0\(2a\)ex5 • cisco ios 15.1\(1\)sy • cisco ios 15.1\(1\)sy1 • cisco ios 15.1\(1\)sy2 • cisco ios 15.1\(1\)sy3 • cisco ios 15.1\(1\)sy4 • cisco ios 15.1\(1\)sy5 • cisco ios 15.1\(1\)sy6 • cisco ios 15.1\(2\)sy • cisco ios 15.1\(2\)sy1 • cisco ios 15.1\(2\)sy2 … and 831 more