CVE-2025-20191

HIGH7.4

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.

CVSS breakdown

CVSS 3.1

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Affected products

cisco / Cisco NX-OS Software8.2(5) – 8.2(5)
cisco / Cisco NX-OS Software7.3(5)D1(1) – 7.3(5)D1(1)
cisco / Cisco NX-OS Software8.4(2) – 8.4(2)
cisco / Cisco NX-OS Software8.4(3) – 8.4(3)
cisco / Cisco NX-OS Software9.2(3) – 9.2(3)
cisco / Cisco NX-OS Software9.2(2v) – 9.2(2v)
cisco / Cisco NX-OS Software7.3(4)D1(1) – 7.3(4)D1(1)
cisco / Cisco NX-OS Software8.2(1) – 8.2(1)
cisco / Cisco NX-OS Software9.2(1) – 9.2(1)
cisco / Cisco NX-OS Software9.2(2t) – 9.2(2t)
cisco / Cisco NX-OS Software9.2(3y) – 9.2(3y)
cisco / Cisco NX-OS Software7.0(3)I7(6z) – 7.0(3)I7(6z)
cisco / Cisco NX-OS Software9.3(2) – 9.3(2)
cisco / Cisco NX-OS Software7.0(3)I7(3z) – 7.0(3)I7(3z)
cisco / Cisco NX-OS Software7.0(3)IM7(2) – 7.0(3)IM7(2)
cisco / Cisco NX-OS Software7.0(3)I7(5a) – 7.0(3)I7(5a)
cisco / Cisco NX-OS Software8.1(1) – 8.1(1)
cisco / Cisco NX-OS Software8.2(2) – 8.2(2)
cisco / Cisco NX-OS Software8.3(2) – 8.3(2)
cisco / Cisco NX-OS Software7.3(2)D1(3a) – 7.3(2)D1(3a)
cisco / Cisco NX-OS Software9.2(4) – 9.2(4)
cisco / Cisco NX-OS Software8.1(2) – 8.1(2)
cisco / Cisco NX-OS Software7.3(3)D1(1) – 7.3(3)D1(1)
cisco / Cisco NX-OS Software8.2(3) – 8.2(3)
cisco / Cisco NX-OS Software7.0(3)I7(2) – 7.0(3)I7(2)
cisco / Cisco NX-OS Software7.0(3)I7(3) – 7.0(3)I7(3)
cisco / Cisco NX-OS Software8.4(1) – 8.4(1)
cisco / Cisco NX-OS Software7.3(0)DX(1) – 7.3(0)DX(1)
cisco / Cisco NX-OS Software7.3(2)D1(1) – 7.3(2)D1(1)
cisco / Cisco NX-OS Software9.3(1) – 9.3(1)
cisco / Cisco NX-OS Software7.0(3)I7(6) – 7.0(3)I7(6)
cisco / Cisco NX-OS Software7.3(2)D1(2) – 7.3(2)D1(2)
cisco / Cisco NX-OS Software8.2(4) – 8.2(4)
cisco / Cisco NX-OS Software7.0(3)I7(4) – 7.0(3)I7(4)
cisco / Cisco NX-OS Software7.0(3)I7(7) – 7.0(3)I7(7)
cisco / Cisco NX-OS Software9.3(1z) – 9.3(1z)
cisco / Cisco NX-OS Software9.2(2) – 9.2(2)
cisco / Cisco NX-OS Software8.1(2a) – 8.1(2a)
cisco / Cisco NX-OS Software7.3(2)D1(3) – 7.3(2)D1(3)
cisco / Cisco NX-OS Software7.0(3)I7(5) – 7.0(3)I7(5)
cisco / Cisco NX-OS Software7.0(3)I7(1) – 7.0(3)I7(1)
cisco / Cisco NX-OS Software7.0(3)IA7(2) – 7.0(3)IA7(2)
cisco / Cisco NX-OS Software7.0(3)IA7(1) – 7.0(3)IA7(1)
cisco / Cisco NX-OS Software8.3(1) – 8.3(1)
cisco / Cisco NX-OS Software7.3(1)D1(1) – 7.3(1)D1(1)
cisco / Cisco NX-OS Software7.3(0)D1(1) – 7.3(0)D1(1)
cisco / Cisco NX-OS Software9.3(3) – 9.3(3)
cisco / Cisco NX-OS Software7.3(2)D1(1d) – 7.3(2)D1(1d)
cisco / Cisco NX-OS Software7.0(3)I7(8) – 7.0(3)I7(8)
cisco / Cisco NX-OS Software9.3(4) – 9.3(4)
cisco / Cisco NX-OS Software7.3(6)D1(1) – 7.3(6)D1(1)
cisco / Cisco NX-OS Software8.2(6) – 8.2(6)
cisco / Cisco NX-OS Software9.3(5) – 9.3(5)
cisco / Cisco NX-OS Software7.0(3)I7(9) – 7.0(3)I7(9)
cisco / Cisco NX-OS Software9.3(6) – 9.3(6)
cisco / Cisco NX-OS Software10.1(2) – 10.1(2)
cisco / Cisco NX-OS Software10.1(1) – 10.1(1)
cisco / Cisco NX-OS Software8.4(4) – 8.4(4)
cisco / Cisco NX-OS Software7.3(7)D1(1) – 7.3(7)D1(1)
cisco / Cisco NX-OS Software9.3(5w) – 9.3(5w)
cisco / Cisco NX-OS Software8.2(7) – 8.2(7)
cisco / Cisco NX-OS Software9.3(7) – 9.3(7)
cisco / Cisco NX-OS Software9.3(7k) – 9.3(7k)
cisco / Cisco NX-OS Software7.0(3)I7(9w) – 7.0(3)I7(9w)
cisco / Cisco NX-OS Software10.2(1) – 10.2(1)
cisco / Cisco NX-OS Software7.3(8)D1(1) – 7.3(8)D1(1)
cisco / Cisco NX-OS Software9.3(7a) – 9.3(7a)
cisco / Cisco NX-OS Software8.2(7a) – 8.2(7a)
cisco / Cisco NX-OS Software9.3(8) – 9.3(8)
cisco / Cisco NX-OS Software8.4(4a) – 8.4(4a)
cisco / Cisco NX-OS Software8.4(5) – 8.4(5)
cisco / Cisco NX-OS Software7.0(3)I7(10) – 7.0(3)I7(10)
cisco / Cisco NX-OS Software8.2(8) – 8.2(8)
cisco / Cisco NX-OS Software10.2(1q) – 10.2(1q)
cisco / Cisco NX-OS Software10.2(2) – 10.2(2)
cisco / Cisco NX-OS Software9.3(9) – 9.3(9)
cisco / Cisco NX-OS Software10.1(2t) – 10.1(2t)
cisco / Cisco NX-OS Software7.3(9)D1(1) – 7.3(9)D1(1)
cisco / Cisco NX-OS Software10.2(3) – 10.2(3)
cisco / Cisco NX-OS Software8.4(6) – 8.4(6)
cisco / Cisco NX-OS Software10.2(3t) – 10.2(3t)
cisco / Cisco NX-OS Software9.3(10) – 9.3(10)
cisco / Cisco NX-OS Software10.2(2a) – 10.2(2a)
cisco / Cisco NX-OS Software8.2(9) – 8.2(9)
cisco / Cisco NX-OS Software10.3(1) – 10.3(1)
cisco / Cisco NX-OS Software10.2(4) – 10.2(4)
cisco / Cisco NX-OS Software8.4(7) – 8.4(7)
cisco / Cisco NX-OS Software10.3(2) – 10.3(2)
cisco / Cisco NX-OS Software8.4(6a) – 8.4(6a)
cisco / Cisco NX-OS Software9.3(11) – 9.3(11)
cisco / Cisco NX-OS Software10.3(3) – 10.3(3)
cisco / Cisco NX-OS Software10.2(5) – 10.2(5)
cisco / Cisco NX-OS Software8.2(10) – 8.2(10)
cisco / Cisco NX-OS Software9.3(12) – 9.3(12)
cisco / Cisco NX-OS Software10.2(3v) – 10.2(3v)
cisco / Cisco NX-OS Software10.4(1) – 10.4(1)
cisco / Cisco NX-OS Software8.4(8) – 8.4(8)
cisco / Cisco NX-OS Software10.3(99w) – 10.3(99w)
cisco / Cisco NX-OS Software10.2(6) – 10.2(6)
cisco / Cisco NX-OS Software10.3(3w) – 10.3(3w)
cisco / Cisco NX-OS Software10.3(99x) – 10.3(99x)
cisco / Cisco NX-OS Software10.3(3o) – 10.3(3o)
cisco / Cisco NX-OS Software8.4(9) – 8.4(9)
cisco / Cisco NX-OS Software10.3(4) – 10.3(4)
cisco / Cisco NX-OS Software10.3(3p) – 10.3(3p)
cisco / Cisco NX-OS Software10.3(4a) – 10.3(4a)
cisco / Cisco NX-OS Software10.4(2) – 10.4(2)
cisco / Cisco NX-OS Software10.3(3q) – 10.3(3q)
cisco / Cisco NX-OS Software9.3(13) – 9.3(13)
cisco / Cisco NX-OS Software8.2(11) – 8.2(11)
cisco / Cisco NX-OS Software10.3(5) – 10.3(5)
cisco / Cisco NX-OS Software10.2(7) – 10.2(7)
cisco / Cisco NX-OS Software10.4(3) – 10.4(3)
cisco / Cisco NX-OS Software10.3(3x) – 10.3(3x)
cisco / Cisco NX-OS Software10.3(4g) – 10.3(4g)
cisco / Cisco NX-OS Software10.2(8) – 10.2(8)
cisco / Cisco NX-OS Software10.3(3r) – 10.3(3r)
cisco / Cisco NX-OS Software9.3(14) – 9.3(14)
cisco / Cisco NX-OS Software10.3(4h) – 10.3(4h)
cisco / Cisco Wireless LAN Controller (WLC)8.10.112.0 – 8.10.112.0
cisco / Cisco Wireless LAN Controller (WLC)8.8.120.0 – 8.8.120.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.143.0 – 8.3.143.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.111.0 – 8.3.111.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.164.0 – 8.2.164.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.109.0 – 8.5.109.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.132.0 – 8.3.132.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.105.0 – 8.5.105.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.170.0 – 8.2.170.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.160.0 – 8.2.160.0
cisco / Cisco Wireless LAN Controller (WLC)8.8.100.0 – 8.8.100.0
cisco / Cisco Wireless LAN Controller (WLC)8.9.111.0 – 8.9.111.0
cisco / Cisco Wireless LAN Controller (WLC)8.7.102.0 – 8.7.102.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.102.0 – 8.3.102.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.133.0 – 8.3.133.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.131.0 – 8.3.131.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.100.0 – 8.5.100.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.131.0 – 8.5.131.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.122.0 – 8.3.122.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.101.0 – 8.5.101.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.112.0 – 8.3.112.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.120.0 – 8.5.120.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.141.0 – 8.2.141.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.141.0 – 8.3.141.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.121.0 – 8.3.121.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.151.0 – 8.2.151.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.130.0 – 8.3.130.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.102.0 – 8.5.102.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.161.0 – 8.2.161.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.151.0 – 8.5.151.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.100.0 – 8.2.100.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.135.0 – 8.5.135.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.135.0 – 8.3.135.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.140.0 – 8.5.140.0
cisco / Cisco Wireless LAN Controller (WLC)8.7.106.0 – 8.7.106.0
cisco / Cisco Wireless LAN Controller (WLC)8.9.100.0 – 8.9.100.0
cisco / Cisco Wireless LAN Controller (WLC)8.8.111.0 – 8.8.111.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.110.0 – 8.2.110.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.110.0 – 8.5.110.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.130.0 – 8.2.130.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.141.105 – 8.5.141.105
cisco / Cisco Wireless LAN Controller (WLC)8.2.121.0 – 8.2.121.0
cisco / Cisco Wireless LAN Controller (WLC)8.8.125.0 – 8.8.125.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.150.0 – 8.3.150.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.111.0 – 8.2.111.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.105.0 – 8.10.105.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.108.0 – 8.5.108.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.108.0 – 8.3.108.0
cisco / Cisco Wireless LAN Controller (WLC)8.2.166.0 – 8.2.166.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.103.0 – 8.5.103.0
cisco / Cisco Wireless LAN Controller (WLC)8.3.140.0 – 8.3.140.0
cisco / Cisco Wireless LAN Controller (WLC)8.6.101.0 – 8.6.101.0
cisco / Cisco Wireless LAN Controller (WLC)8.4.100.0 – 8.4.100.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.160.0 – 8.5.160.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.161.0 – 8.5.161.0
cisco / Cisco Wireless LAN Controller (WLC)8.8.130.0 – 8.8.130.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.120.0 – 8.10.120.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.121.0 – 8.10.121.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.113.0 – 8.10.113.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.122.0 – 8.10.122.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.130.0 – 8.10.130.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.141.0 – 8.10.141.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.142.0 – 8.10.142.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.171.0 – 8.5.171.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.150.0 – 8.10.150.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.151.0 – 8.10.151.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.162.0 – 8.10.162.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.0 – 8.5.182.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.171.0 – 8.10.171.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.180.0 – 8.10.180.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.181.0 – 8.10.181.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.182.0 – 8.10.182.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.170.0 – 8.10.170.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.183.0 – 8.10.183.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.7 – 8.5.182.7
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.105 – 8.5.182.105
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.106 – 8.5.182.106
cisco / Cisco Wireless LAN Controller (WLC)8.10.185.0 – 8.10.185.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.107 – 8.5.182.107
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.11 – 8.5.182.11
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.108 – 8.5.182.108
cisco / Cisco Wireless LAN Controller (WLC)8.10.190.0 – 8.10.190.0
cisco / Cisco Wireless LAN Controller (WLC)8.10.195.0 – 8.10.195.0
cisco / Cisco Wireless LAN Controller (WLC)8.5.182.12 – 8.5.182.12

References

VENDOR_ADVISORYhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sisf-dos-ZGwt4DdY

Updated 12m ago · 8 sources