CVE-2025-20191
published 2025-05-07CVE-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…
PriorityP337high7.4CVSS 3.1
AVAACLPRNUINSCCNINAH
EPSS
0.20%
10.2th percentile
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
204 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 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 | — | — |
| 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 | — | — |
| 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 | — | — |
| cisco | cisco_nx-os_software | — | — |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
vendor_cisco7.4HIGH
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Cisco
Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
vendor_cisco·2025-05-07·CVSS 7.4
CVE-2025-20191 [HIGH] CWE-805 Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
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.
Cisco has released software updates that address this vulnerability. There are no workarounds that address th
Cisco
Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
vendor_cisco·CVSS 3.1
CVE-2025-20191 Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
CVE-2025-20191: Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability
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. Cisco has released software updates that address this vulnerability. There are no
CVSS: 3.1
CWE:
GHSA
GHSA-vx24-6mq3-c5cq: A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wirele
ghsa_unreviewed·2025-05-07
CVE-2025-20191 [HIGH] CWE-805 GHSA-vx24-6mq3-c5cq: A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wirele
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-05-07
Published