CVE-2025-20170

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

  OS
  Cisco
  12.2\(1\)12.2\(1a\)12.2\(1a\)xc12.2\(1a\)xc112.2\(1a\)xc212.2\(1a\)xc312.2\(1b\)12.2\(1b\)da12.2\(1b\)da112.2\(1c\)12.2\(1d\)12.2\(1\)dx12.2\(1\)dx112.2\(1\)m012.2\(1\)mb1+ 85 more