CVE-2025-20151: ios xe sd-wan — Fix

Description

A vulnerability in the implementation of the Simple Network Management Protocol Version 3 (SNMPv3) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to poll an affected device using SNMP, even if the device is configured to deny SNMP traffic from an unauthorized source or the SNMPv3 username is removed from the configuration. This vulnerability exists because of the way that the SNMPv3 configuration is stored in the Cisco IOS Software and Cisco IOS XE Software startup configuration. An attacker could exploit this vulnerability by polling an affected device from a source address that should have been denied. A successful exploit could allow the attacker to perform SNMP operations from a source that should be denied. Note: The attacker has no control of the SNMPv3 configuration. To exploit this vulnerability, the attacker must have valid SNMPv3 user credentials. For more information, see the section of this advisory.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-16 CWE-16

CWE-1284 CWE-1284

Affected Products

Vendor	Product	Versions
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All
cisco	ios_xe_sd-wan	All

References

Advisories & Patches

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmpv3-qKEYvzsy

Frequently Asked Questions

What is CVE-2025-20151? +

A vulnerability in the implementation of the Simple Network Management Protocol Version 3 (SNMPv3) feature of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to poll an affected device using SNMP, even if the device is configured to deny SNMP traffic from an unauthorized source or the SNMPv3 username is removed from the configuration. This vulnerability exists because of the way that the SNMPv3 configuration is stored in the Cisco IOS Software and Cisco IOS XE Software startup configuration. An attacker could exploit this vulnerability by polling an affected device from a source address that should have been denied. A successful exploit could allow the attacker to perform SNMP operations from a source that should be denied. Note: The attacker has no control of the SNMPv3 configuration. To exploit this vulnerability, the attacker must have valid SNMPv3 user credentials. For more information, see the section of this advisory. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-20151? +

CVE-2025-20151 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-20151? +

CVE-2025-20151 affects products from cisco, specifically: ios_xe_sd-wan. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-20151? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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