Vulnerability Intelligence Report
Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerability
CVE-2025-20253
A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is due to the improper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to cause an infinite loop that exhausts resources and could cause the device to reload.
No Active Exploit Signals
CVSS Base Score
8.6
HIGH
Exploitability:3.9
Impact Score:4.0
EPSS Probability:0.41%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-835 ↗Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | 9.12.3 (affected), 9.8.3 (affected), 9.12.1 (affected), 9.8.1 (affected), 9.12.2 (affected), 9.8.2.45 (affected), 9.8.2 (affected), 9.8.4 (affected), 9.14.1 (affected), 9.12.4 (affected), 9.8.2.26 (affected), 9.8.2.24 (affected), 9.8.2.15 (affected), 9.8.2.14 (affected), 9.8.2.35 (affected), 9.8.2.20 (affected), 9.8.2.8 (affected), 9.8.2.17 (affected), 9.8.2.28 (affected), 9.8.2.33 (affected), 9.8.2.38 (affected), 9.8.4.25 (affected), 9.12.3.2 (affected), 9.12.3.7 (affected), 9.8.3.18 (affected), 9.8.3.14 (affected), 9.8.4.15 (affected), 9.8.4.8 (affected), 9.8.1.7 (affected), 9.8.3.29 (affected), 9.14.1.10 (affected), 9.12.2.5 (affected), 9.8.4.22 (affected), 9.12.3.12 (affected), 9.8.4.7 (affected), 9.8.4.17 (affected), 9.8.3.16 (affected), 9.8.4.20 (affected), 9.8.3.11 (affected), 9.12.1.3 (affected), 9.8.4.3 (affected), 9.12.2.4 (affected), 9.8.4.12 (affected), 9.12.1.2 (affected), 9.8.3.26 (affected), 9.8.1.5 (affected), 9.12.2.9 (affected), 9.12.3.9 (affected), 9.8.3.21 (affected), 9.8.4.10 (affected), 9.12.2.1 (affected), 9.12.4.2 (affected), 9.14.1.6 (affected), 9.8.3.8 (affected), 9.14.1.15 (affected), 9.14.1.19 (affected), 9.8.4.26 (affected), 9.12.4.4 (affected), 9.14.1.30 (affected), 9.8.4.29 (affected), 9.12.4.7 (affected), 9.14.2 (affected), 9.12.4.8 (affected), 9.8.4.32 (affected), 9.12.4.10 (affected), 9.14.2.4 (affected), 9.14.2.8 (affected), 9.12.4.13 (affected), 9.8.4.33 (affected), 9.14.2.13 (affected), 9.8.4.34 (affected), 9.12.4.18 (affected), 9.8.4.35 (affected), 9.14.2.15 (affected), 9.12.4.24 (affected), 9.16.1 (affected), 9.8.4.39 (affected), 9.14.3 (affected), 9.12.4.26 (affected), 9.16.1.28 (affected), 9.14.3.1 (affected), 9.12.4.29 (affected), 9.14.3.9 (affected), 9.16.2 (affected), 9.12.4.30 (affected), 9.16.2.3 (affected), 9.8.4.40 (affected), 9.14.3.11 (affected), 9.12.4.35 (affected), 9.8.4.41 (affected), 9.14.3.13 (affected), 9.16.2.7 (affected), 9.12.4.37 (affected), 9.14.3.15 (affected), 9.17.1 (affected), 9.16.2.11 (affected), 9.14.3.18 (affected), 9.16.2.13 (affected), 9.12.4.39 (affected), 9.12.4.38 (affected), 9.8.4.43 (affected), 9.14.4 (affected), 9.16.2.14 (affected), 9.17.1.7 (affected), 9.12.4.40 (affected), 9.16.3.3 (affected), 9.14.4.6 (affected), 9.16.3 (affected), 9.16.3.14 (affected), 9.17.1.9 (affected), 9.14.4.7 (affected), 9.12.4.41 (affected), 9.17.1.10 (affected), 9.8.4.44 (affected), 9.18.1 (affected), 9.12.4.47 (affected), 9.14.4.12 (affected), 9.16.3.15 (affected), 9.18.1.3 (affected), 9.17.1.11 (affected), 9.12.4.48 (affected), 9.14.4.13 (affected), 9.18.2 (affected), 9.16.3.19 (affected), 9.17.1.13 (affected), 9.12.4.50 (affected), 9.14.4.14 (affected), 9.17.1.15 (affected), 9.8.4.45 (affected), 9.12.4.52 (affected), 9.14.4.15 (affected), 9.16.3.23 (affected), 9.18.2.5 (affected), 9.16.4 (affected), 9.12.4.54 (affected), 9.14.4.17 (affected), 9.8.4.46 (affected), 9.17.1.20 (affected), 9.18.2.7 (affected), 9.19.1 (affected), 9.16.4.9 (affected), 9.12.4.55 (affected), 9.18.2.8 (affected), 9.14.4.22 (affected), 9.16.4.14 (affected), 9.8.4.48 (affected), 9.18.3 (affected), 9.19.1.5 (affected), 9.14.4.23 (affected), 9.12.4.56 (affected), 9.16.4.18 (affected), 9.17.1.30 (affected), 9.19.1.9 (affected), 9.18.3.39 (affected), 9.16.4.19 (affected), 9.12.4.58 (affected), 9.19.1.12 (affected), 9.18.3.46 (affected), 9.16.4.27 (affected), 9.19.1.18 (affected), 9.18.3.53 (affected), 9.18.3.55 (affected), 9.16.4.38 (affected), 9.17.1.33 (affected), 9.12.4.62 (affected), 9.16.4.39 (affected), 9.18.3.56 (affected), 9.20.1 (affected), 9.16.4.42 (affected), 9.19.1.22 (affected), 9.18.4 (affected), 9.20.1.5 (affected), 9.18.4.5 (affected), 9.19.1.24 (affected), 9.16.4.48 (affected), 9.18.4.8 (affected), 9.20.2 (affected), 9.19.1.27 (affected), 9.12.4.65 (affected), 9.16.4.55 (affected), 9.18.4.22 (affected), 9.20.2.10 (affected), 9.16.4.57 (affected), 9.19.1.28 (affected), 9.17.1.39 (affected), 9.12.4.67 (affected), 9.14.4.24 (affected), 9.18.4.24 (affected), 9.20.2.21 (affected), 9.16.4.61 (affected), 9.19.1.31 (affected), 9.18.4.29 (affected), 9.20.2.22 (affected), 9.16.4.62 (affected), 9.18.4.34 (affected), 9.20.3 (affected), 9.16.4.67 (affected), 9.16.4.70 (affected), 9.18.4.40 (affected), 9.23.1 (affected), 9.22.1.1 (affected), 9.16.4.71 (affected), 9.20.3.4 (affected), 9.18.4.47 (affected), 9.20.3.7 (affected), 9.17.1.45 (affected), 9.19.1.37 (affected), 9.17.1.46 (affected), 9.16.4.76 (affected), 9.20.3.9 (affected), 9.19.1.38 (affected), 9.18.4.50 (affected), 9.22.1.3 (affected), 9.20.3.10 (affected), 9.22.1.2 (affected), 9.18.4.52 (affected), 9.20.3.13 (affected) |
| Cisco | Cisco Firepower Threat Defense Software | 6.2.3.14 (affected), 6.4.0.1 (affected), 6.2.3.7 (affected), 6.2.3 (affected), 6.4.0.2 (affected), 6.2.3.9 (affected), 6.2.3.1 (affected), 6.2.3.2 (affected), 6.4.0.5 (affected), 6.2.3.10 (affected), 6.4.0 (affected), 6.4.0.3 (affected), 6.2.3.6 (affected), 6.4.0.4 (affected), 6.2.3.15 (affected), 6.2.3.5 (affected), 6.2.3.4 (affected), 6.2.3.3 (affected), 6.2.3.8 (affected), 6.4.0.6 (affected), 6.2.3.11 (affected), 6.2.3.12 (affected), 6.2.3.13 (affected), 6.4.0.7 (affected), 6.4.0.8 (affected), 6.6.0 (affected), 6.4.0.9 (affected), 6.2.3.16 (affected), 6.6.0.1 (affected), 6.6.1 (affected), 6.4.0.10 (affected), 6.4.0.11 (affected), 6.6.3 (affected), 6.6.4 (affected), 6.4.0.12 (affected), 7.0.0 (affected), 6.2.3.17 (affected), 7.0.0.1 (affected), 6.6.5 (affected), 7.0.1 (affected), 7.1.0 (affected), 6.4.0.13 (affected), 6.6.5.1 (affected), 6.2.3.18 (affected), 7.0.1.1 (affected), 6.4.0.14 (affected), 7.1.0.1 (affected), 6.6.5.2 (affected), 7.0.2 (affected), 6.4.0.15 (affected), 7.2.0 (affected), 7.0.2.1 (affected), 7.0.3 (affected), 6.6.7 (affected), 7.1.0.2 (affected), 7.2.0.1 (affected), 7.0.4 (affected), 7.2.1 (affected), 7.0.5 (affected), 6.4.0.16 (affected), 7.3.0 (affected), 7.2.2 (affected), 7.2.3 (affected), 6.6.7.1 (affected), 7.3.1 (affected), 7.1.0.3 (affected), 7.2.4 (affected), 7.0.6 (affected), 7.2.5 (affected), 7.2.4.1 (affected), 7.3.1.1 (affected), 7.4.0 (affected), 6.4.0.17 (affected), 7.0.6.1 (affected), 7.2.5.1 (affected), 7.4.1 (affected), 7.2.6 (affected), 7.0.6.2 (affected), 7.4.1.1 (affected), 6.6.7.2 (affected), 6.4.0.18 (affected), 7.2.7 (affected), 7.2.5.2 (affected), 7.3.1.2 (affected), 7.2.8 (affected), 7.6.0 (affected), 7.4.2 (affected), 7.2.8.1 (affected), 7.0.6.3 (affected), 7.4.2.1 (affected), 7.2.9 (affected), 7.0.7 (affected), 7.7.0 (affected), 7.4.2.2 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.414%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cisco Systems, Inc. · Hosted Service · USA |
| Reserved | 2024-10-10T19:15:13 |
| Published | 2025-08-14T16:29:43 |
| Last Updated | 2025-08-14T19:19:22 |
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