CVE-2025-20173
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
Frequently Asked Questions
What is the severity of CVE-2025-20173?
CVE-2025-20173 is classified as a high severity vulnerability due to its potential to cause a Denial of Service condition on affected Cisco devices.
How do I fix CVE-2025-20173?
To fix CVE-2025-20173, you should apply the latest patches provided by Cisco for affected versions of IOS and IOS XE Software.
Who is affected by CVE-2025-20173?
CVE-2025-20173 affects any device running Cisco IOS Software or Cisco IOS XE Software that utilizes the SNMP subsystem.
What type of attack can be performed using CVE-2025-20173?
An authenticated, remote attacker can exploit CVE-2025-20173 to trigger a Denial of Service condition on vulnerable Cisco devices.
Is CVE-2025-20173 exploitable from outside the network?
No, CVE-2025-20173 requires an authenticated user to exploit the vulnerability, limiting its risk to internal networks.
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