CISCO-CVE-2025-20239

HIGH8.6

Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerability

Published Aug 14, 2025

Modified 6 months ago

Affected Packages

Cisco IOS

CiscoIOS

Affected versions:

12.2(6)I115.1(3)SVR115.1(3)SVR1015.1(3)SVR215.1(3)SVR315.1(3)SVS15.1(3)SVS115.1(3)SVT115.1(3)SVT215.1(3)SVT3+301 more

Cisco IOS XE

CiscoIOSXE

Affected versions:

16.1.116.1.216.1.316.10.116.10.1a16.10.1b16.10.1c16.10.1d16.10.1e16.10.1f+363 more

CVSS Analysis

CVSS v3.1

8.6

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

ChangedS:C

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

8.6/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Upstream

Ecosystems

Timeline

PublishedAug 14, 2025

ModifiedAug 14, 2025