CVE-2025-20171: High severity cisco ios vulnerability
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.
Affected Software
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2025-20171?
CVE-2025-20171 has been classified as a critical vulnerability due to its potential to cause a denial of service condition.
How do I fix CVE-2025-20171?
To fix CVE-2025-20171, apply the latest Cisco IOS and Cisco IOS XE Software updates released by Cisco.
What causes CVE-2025-20171?
CVE-2025-20171 is caused by improper error handling when Cisco IOS and IOS XE Software parse SNMP requests.
Who is affected by CVE-2025-20171?
CVE-2025-20171 affects devices running vulnerable versions of Cisco IOS Software and Cisco IOS XE Software that utilize SNMP.
Can CVE-2025-20171 be exploited remotely?
Yes, CVE-2025-20171 can be exploited by an authenticated remote attacker.