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    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.

    Published:Aug 14, 2025
    Last Modified:Apr 15, 2026
    EPS:Aug 14, 2025
    EPSS Score:0.00047
    CVSS Score:8.6

    Affected Products

    Vendor
    Cisco
    Product
    Adaptive Security Appliance Software
    Vendor
    Cisco
    Product
    Firepower Threat Defense Software
    Vendor
    Cisco
    Product
    Ios
    Vendor
    Cisco
    Product
    Ios Xe
    Vendor
    Cisco
    Product
    Ios Xe Software

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High