CVE-2025-20176
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-2025-20176?
CVE-2025-20176 has a high severity rating due to its potential to cause a denial of service condition.
How do I fix CVE-2025-20176?
To fix CVE-2025-20176, upgrade to the latest version of the affected Cisco IOS or Cisco IOS XE software that addresses this vulnerability.
Who is affected by CVE-2025-20176?
CVE-2025-20176 affects devices running Cisco IOS Software and Cisco IOS XE Software that utilize SNMP.
What type of attack does CVE-2025-20176 enable?
CVE-2025-20176 enables an authenticated, remote attacker to perform a denial of service attack on the affected device.
When was CVE-2025-20176 disclosed?
CVE-2025-20176 was disclosed in 2025, although specific dates may vary based on vendor notifications.
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