FKIE_CVE-2025-20254
Vulnerability from fkie_nvd - Published: 2025-08-14 17:15 - Updated: 2026-06-17 08:41
Severity
Summary
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this vulnerability by sending a continuous stream of crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to partially exhaust system memory, causing system instability like being unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"product": "Cisco Adaptive Security Appliance (ASA) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "9.12.1"
},
{
"status": "affected",
"version": "9.12.1.2"
},
{
"status": "affected",
"version": "9.12.1.3"
},
{
"status": "affected",
"version": "9.12.2"
},
{
"status": "affected",
"version": "9.12.2.4"
},
{
"status": "affected",
"version": "9.12.2.5"
},
{
"status": "affected",
"version": "9.12.2.9"
},
{
"status": "affected",
"version": "9.12.3"
},
{
"status": "affected",
"version": "9.12.3.2"
},
{
"status": "affected",
"version": "9.12.3.7"
},
{
"status": "affected",
"version": "9.12.4"
},
{
"status": "affected",
"version": "9.12.3.12"
},
{
"status": "affected",
"version": "9.12.3.9"
},
{
"status": "affected",
"version": "9.12.2.1"
},
{
"status": "affected",
"version": "9.12.4.2"
},
{
"status": "affected",
"version": "9.12.4.4"
},
{
"status": "affected",
"version": "9.12.4.7"
},
{
"status": "affected",
"version": "9.12.4.10"
},
{
"status": "affected",
"version": "9.12.4.13"
},
{
"status": "affected",
"version": "9.12.4.8"
},
{
"status": "affected",
"version": "9.12.4.18"
},
{
"status": "affected",
"version": "9.12.4.24"
},
{
"status": "affected",
"version": "9.12.4.26"
},
{
"status": "affected",
"version": "9.12.4.29"
},
{
"status": "affected",
"version": "9.12.4.30"
},
{
"status": "affected",
"version": "9.12.4.35"
},
{
"status": "affected",
"version": "9.12.4.37"
},
{
"status": "affected",
"version": "9.12.4.38"
},
{
"status": "affected",
"version": "9.12.4.39"
},
{
"status": "affected",
"version": "9.12.4.40"
},
{
"status": "affected",
"version": "9.12.4.41"
},
{
"status": "affected",
"version": "9.12.4.47"
},
{
"status": "affected",
"version": "9.12.4.48"
},
{
"status": "affected",
"version": "9.12.4.50"
},
{
"status": "affected",
"version": "9.12.4.52"
},
{
"status": "affected",
"version": "9.12.4.54"
},
{
"status": "affected",
"version": "9.12.4.55"
},
{
"status": "affected",
"version": "9.12.4.56"
},
{
"status": "affected",
"version": "9.12.4.58"
},
{
"status": "affected",
"version": "9.12.4.62"
},
{
"status": "affected",
"version": "9.12.4.65"
},
{
"status": "affected",
"version": "9.12.4.67"
},
{
"status": "affected",
"version": "9.14.1"
},
{
"status": "affected",
"version": "9.14.1.10"
},
{
"status": "affected",
"version": "9.14.1.6"
},
{
"status": "affected",
"version": "9.14.1.15"
},
{
"status": "affected",
"version": "9.14.1.19"
},
{
"status": "affected",
"version": "9.14.1.30"
},
{
"status": "affected",
"version": "9.14.2"
},
{
"status": "affected",
"version": "9.14.2.4"
},
{
"status": "affected",
"version": "9.14.2.8"
},
{
"status": "affected",
"version": "9.14.2.13"
},
{
"status": "affected",
"version": "9.14.2.15"
},
{
"status": "affected",
"version": "9.14.3"
},
{
"status": "affected",
"version": "9.14.3.1"
},
{
"status": "affected",
"version": "9.14.3.9"
},
{
"status": "affected",
"version": "9.14.3.11"
},
{
"status": "affected",
"version": "9.14.3.13"
},
{
"status": "affected",
"version": "9.14.3.18"
},
{
"status": "affected",
"version": "9.14.3.15"
},
{
"status": "affected",
"version": "9.14.4"
},
{
"status": "affected",
"version": "9.14.4.6"
},
{
"status": "affected",
"version": "9.14.4.7"
},
{
"status": "affected",
"version": "9.14.4.12"
},
{
"status": "affected",
"version": "9.14.4.13"
},
{
"status": "affected",
"version": "9.14.4.14"
},
{
"status": "affected",
"version": "9.14.4.15"
},
{
"status": "affected",
"version": "9.14.4.17"
},
{
"status": "affected",
"version": "9.14.4.22"
},
{
"status": "affected",
"version": "9.14.4.23"
},
{
"status": "affected",
"version": "9.14.4.24"
},
{
"status": "affected",
"version": "9.16.1"
},
{
"status": "affected",
"version": "9.16.1.28"
},
{
"status": "affected",
"version": "9.16.2"
},
{
"status": "affected",
"version": "9.16.2.3"
},
{
"status": "affected",
"version": "9.16.2.7"
},
{
"status": "affected",
"version": "9.16.2.11"
},
{
"status": "affected",
"version": "9.16.2.13"
},
{
"status": "affected",
"version": "9.16.2.14"
},
{
"status": "affected",
"version": "9.16.3"
},
{
"status": "affected",
"version": "9.16.3.3"
},
{
"status": "affected",
"version": "9.16.3.14"
},
{
"status": "affected",
"version": "9.16.3.15"
},
{
"status": "affected",
"version": "9.16.3.19"
},
{
"status": "affected",
"version": "9.16.3.23"
},
{
"status": "affected",
"version": "9.16.4"
},
{
"status": "affected",
"version": "9.16.4.9"
},
{
"status": "affected",
"version": "9.16.4.14"
},
{
"status": "affected",
"version": "9.16.4.18"
},
{
"status": "affected",
"version": "9.16.4.19"
},
{
"status": "affected",
"version": "9.16.4.27"
},
{
"status": "affected",
"version": "9.16.4.38"
},
{
"status": "affected",
"version": "9.16.4.39"
},
{
"status": "affected",
"version": "9.16.4.42"
},
{
"status": "affected",
"version": "9.16.4.48"
},
{
"status": "affected",
"version": "9.16.4.55"
},
{
"status": "affected",
"version": "9.16.4.57"
},
{
"status": "affected",
"version": "9.16.4.61"
},
{
"status": "affected",
"version": "9.16.4.62"
},
{
"status": "affected",
"version": "9.16.4.67"
},
{
"status": "affected",
"version": "9.16.4.70"
},
{
"status": "affected",
"version": "9.16.4.71"
},
{
"status": "affected",
"version": "9.16.4.76"
},
{
"status": "affected",
"version": "9.16.4.82"
},
{
"status": "affected",
"version": "9.17.1"
},
{
"status": "affected",
"version": "9.17.1.7"
},
{
"status": "affected",
"version": "9.17.1.9"
},
{
"status": "affected",
"version": "9.17.1.10"
},
{
"status": "affected",
"version": "9.17.1.11"
},
{
"status": "affected",
"version": "9.17.1.13"
},
{
"status": "affected",
"version": "9.17.1.15"
},
{
"status": "affected",
"version": "9.17.1.20"
},
{
"status": "affected",
"version": "9.17.1.30"
},
{
"status": "affected",
"version": "9.17.1.33"
},
{
"status": "affected",
"version": "9.17.1.39"
},
{
"status": "affected",
"version": "9.17.1.45"
},
{
"status": "affected",
"version": "9.17.1.46"
},
{
"status": "affected",
"version": "9.18.1"
},
{
"status": "affected",
"version": "9.18.1.3"
},
{
"status": "affected",
"version": "9.18.2"
},
{
"status": "affected",
"version": "9.18.2.5"
},
{
"status": "affected",
"version": "9.18.2.7"
},
{
"status": "affected",
"version": "9.18.2.8"
},
{
"status": "affected",
"version": "9.18.3"
},
{
"status": "affected",
"version": "9.18.3.39"
},
{
"status": "affected",
"version": "9.18.3.46"
},
{
"status": "affected",
"version": "9.18.3.53"
},
{
"status": "affected",
"version": "9.18.3.55"
},
{
"status": "affected",
"version": "9.18.3.56"
},
{
"status": "affected",
"version": "9.18.4"
},
{
"status": "affected",
"version": "9.18.4.5"
},
{
"status": "affected",
"version": "9.18.4.8"
},
{
"status": "affected",
"version": "9.18.4.22"
},
{
"status": "affected",
"version": "9.18.4.24"
},
{
"status": "affected",
"version": "9.18.4.29"
},
{
"status": "affected",
"version": "9.18.4.34"
},
{
"status": "affected",
"version": "9.18.4.40"
},
{
"status": "affected",
"version": "9.18.4.47"
},
{
"status": "affected",
"version": "9.18.4.50"
},
{
"status": "affected",
"version": "9.18.4.52"
},
{
"status": "affected",
"version": "9.18.4.53"
},
{
"status": "affected",
"version": "9.19.1"
},
{
"status": "affected",
"version": "9.19.1.5"
},
{
"status": "affected",
"version": "9.19.1.9"
},
{
"status": "affected",
"version": "9.19.1.12"
},
{
"status": "affected",
"version": "9.19.1.18"
},
{
"status": "affected",
"version": "9.19.1.22"
},
{
"status": "affected",
"version": "9.19.1.24"
},
{
"status": "affected",
"version": "9.19.1.27"
},
{
"status": "affected",
"version": "9.19.1.28"
},
{
"status": "affected",
"version": "9.19.1.31"
},
{
"status": "affected",
"version": "9.19.1.37"
},
{
"status": "affected",
"version": "9.19.1.38"
},
{
"status": "affected",
"version": "9.20.1"
},
{
"status": "affected",
"version": "9.20.1.5"
},
{
"status": "affected",
"version": "9.20.2"
},
{
"status": "affected",
"version": "9.20.2.10"
},
{
"status": "affected",
"version": "9.20.2.21"
},
{
"status": "affected",
"version": "9.20.2.22"
},
{
"status": "affected",
"version": "9.20.3"
},
{
"status": "affected",
"version": "9.20.3.4"
},
{
"status": "affected",
"version": "9.20.3.7"
},
{
"status": "affected",
"version": "9.20.3.9"
},
{
"status": "affected",
"version": "9.20.3.10"
},
{
"status": "affected",
"version": "9.20.3.13"
},
{
"status": "affected",
"version": "9.22.1.1"
},
{
"status": "affected",
"version": "9.22.1.3"
},
{
"status": "affected",
"version": "9.22.1.2"
},
{
"status": "affected",
"version": "9.22.1.6"
},
{
"status": "affected",
"version": "9.23.1"
}
]
},
{
"product": "Cisco Firepower Threat Defense Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.2.3"
},
{
"status": "affected",
"version": "6.2.3.1"
},
{
"status": "affected",
"version": "6.2.3.2"
},
{
"status": "affected",
"version": "6.2.3.3"
},
{
"status": "affected",
"version": "6.2.3.4"
},
{
"status": "affected",
"version": "6.2.3.5"
},
{
"status": "affected",
"version": "6.2.3.6"
},
{
"status": "affected",
"version": "6.2.3.7"
},
{
"status": "affected",
"version": "6.2.3.8"
},
{
"status": "affected",
"version": "6.2.3.10"
},
{
"status": "affected",
"version": "6.2.3.11"
},
{
"status": "affected",
"version": "6.2.3.9"
},
{
"status": "affected",
"version": "6.2.3.12"
},
{
"status": "affected",
"version": "6.2.3.13"
},
{
"status": "affected",
"version": "6.2.3.14"
},
{
"status": "affected",
"version": "6.2.3.15"
},
{
"status": "affected",
"version": "6.2.3.16"
},
{
"status": "affected",
"version": "6.2.3.17"
},
{
"status": "affected",
"version": "6.2.3.18"
},
{
"status": "affected",
"version": "6.6.0"
},
{
"status": "affected",
"version": "6.6.0.1"
},
{
"status": "affected",
"version": "6.6.1"
},
{
"status": "affected",
"version": "6.6.3"
},
{
"status": "affected",
"version": "6.6.4"
},
{
"status": "affected",
"version": "6.6.5"
},
{
"status": "affected",
"version": "6.6.5.1"
},
{
"status": "affected",
"version": "6.6.5.2"
},
{
"status": "affected",
"version": "6.6.7"
},
{
"status": "affected",
"version": "6.6.7.1"
},
{
"status": "affected",
"version": "6.6.7.2"
},
{
"status": "affected",
"version": "6.4.0"
},
{
"status": "affected",
"version": "6.4.0.1"
},
{
"status": "affected",
"version": "6.4.0.3"
},
{
"status": "affected",
"version": "6.4.0.2"
},
{
"status": "affected",
"version": "6.4.0.4"
},
{
"status": "affected",
"version": "6.4.0.5"
},
{
"status": "affected",
"version": "6.4.0.6"
},
{
"status": "affected",
"version": "6.4.0.7"
},
{
"status": "affected",
"version": "6.4.0.8"
},
{
"status": "affected",
"version": "6.4.0.9"
},
{
"status": "affected",
"version": "6.4.0.10"
},
{
"status": "affected",
"version": "6.4.0.11"
},
{
"status": "affected",
"version": "6.4.0.12"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.7.0"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improper parsing of IKEv2 packets. An attacker could exploit this vulnerability by sending a continuous stream of crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to partially exhaust system memory, causing system instability like being unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition."
},
{
"lang": "es",
"value": "Una vulnerabilidad en el m\u00f3dulo Intercambio de Claves de Internet Versi\u00f3n 2 (IKEv2) del software Cisco Secure Firewall Adaptive Security Appliance (ASA) y del software Secure Firewall Threat Defense (FTD) podr\u00eda permitir que un atacante remoto no autenticado provoque una fuga de memoria, lo que resulta en una denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad se debe a un an\u00e1lisis incorrecto de paquetes IKEv2. Un atacante podr\u00eda explotarla enviando un flujo continuo de paquetes IKEv2 manipulados a un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante agotar parcialmente la memoria del sistema, lo que causar\u00eda inestabilidad, como la imposibilidad de establecer nuevas sesiones VPN IKEv2. Es necesario reiniciar el dispositivo manualmente para solucionar este problema."
}
],
"id": "CVE-2025-20254",
"lastModified": "2026-06-17T08:41:12.217",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4,
"source": "psirt@cisco.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-20254",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-14T18:37:31.427730Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-08-14T17:15:39.217",
"references": [
{
"source": "psirt@cisco.com",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-ios-dos-DOESHWHy"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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