CVE-2025-20191
Multiple Cisco Products Denial of Service Vulnerability
Severity
High 7.4
CVSS 3.1
Exploited
Not listed
EPSS
0.002
12.5th percentile
Discovered by
Third party
Published by the vendor
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 |
Vendor-reported affected versions (2)
- Cisco · Cisco NX-OS Software
- Cisco · Cisco Wireless LAN Controller (WLC)