CVE-2025-20191
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.4
- CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS probability
- 0.24%
- CWE
- CWE-805
- Published
- 2025-05-07
- Last modified
- 2026-03-12
Affected products
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
- Cisco Cisco NX-OS Software
Weakness type
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