CVE-2025-20171
First published: Wed Feb 05 2025(Updated: )
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.
Credit: psirt@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | ||
| Cisco IOS XE Software |
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Reference Links
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.
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