Vulnerability · Published May 7, 2025 · Assigned by cisco
CVE-2025-20191Multiple Cisco Products Denial of Service Vulnerability
High 7.4
In plain English
A high-severity security flaw in Cisco NX-OS Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco NX-OS Software | 8.2(5)7.3(5)D1(1)8.4(2)8.4(3)9.2(3)9.2(2v)7.3(4)D1(1)8.2(1) |
| Cisco | Cisco Wireless LAN Controller (WLC) | 8.10.112.08.8.120.08.3.143.08.3.111.08.2.164.08.5.109.08.3.132.08.5.105.0 |
Weakness: CWE-805 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H