CVE-2025-20191
Multiple Cisco Products Denial of Service Vulnerability
Severity
High 7.4
CVSS 3.1
Exploited
Not listed
EPSS
0.002
14.8th percentile
Discovered by
Third party
Vendor-published field
Published
May 7, 2025
Assigned by cisco
Description
A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Weakness: CWE-805
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco NX-OS Software | Routing & Switching | cna-assigner |
| Cisco | Cisco Wireless LAN Controller | Routing & Switching | cna-assigner |
Vendor-reported products (2)
- Cisco · Cisco NX-OS Software
- Cisco · Cisco Wireless LAN Controller (WLC)