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CVE-2025-20192

A vulnerability in the Internet Key Exchange version 1 (IKEv1) implementation of Cisco IOS XE Software could allow an authenticated,…

High7.7EPSS 0.47%
Published
Updated
Reserved
Assigned by
cisco

Description

A vulnerability in the Internet Key Exchange version 1 (IKEv1) implementation of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The attacker must have valid IKEv1 VPN credentials to exploit this vulnerability. This vulnerability is due to improper validation of IKEv1 phase 2 parameters before the IPsec security association creation request is handed off to the hardware cryptographic accelerator of an affected device. An attacker could exploit this vulnerability by sending crafted IKEv1 messages to the affected device. A successful exploit could allow the attacker to cause the device to reload.

Scores

CVSS scores of CVE-2025-20192, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1High7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVDNVD · Analyzed3.1High7.7CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.47% · top 59% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.

Weakness

Affected products

  • Cisco · Cisco IOS XE Software

    • affected 3.13.0S
    • affected 3.13.1S
    • affected 3.13.2S
    • affected 3.13.3S
    • affected 3.13.4S
    • affected 3.13.5S
    • affected 3.13.6S
    • affected 3.13.7S
    • affected 3.13.6aS
    • affected 3.13.8S
    • affected 3.13.9S
    • affected 3.13.10S
    • affected 3.14.0S
    • affected 3.14.1S
    • affected 3.14.2S
    • affected 3.14.3S
    • affected 3.14.4S
    • affected 3.15.0S
    • affected 3.15.1S
    • affected 3.15.2S
    • affected 3.15.1cS
    • affected 3.15.3S
    • affected 3.15.4S
    • affected 3.16.0S
    • affected 3.16.1aS
    • affected 3.16.2S
    • affected 3.16.0cS
    • affected 3.16.3S
    • affected 3.16.4aS
    • affected 3.16.4bS
    • affected 3.16.5S
    • affected 3.16.4dS
    • affected 3.16.6S
    • affected 3.16.7S
    • affected 3.16.6bS
    • affected 3.16.7aS
    • affected 3.16.7bS
    • affected 3.16.8S
    • affected 3.16.9S
    • affected 3.16.10S
    • and 149 more

What to do

Exploitation: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2025-20192 badge
[![CVE-2025-20192](https://trackcve.app/badge/CVE-2025-20192.svg)](https://trackcve.app/cve/CVE-2025-20192)

Record last updated .