PT-2025-39296 · Cisco · Cisco Ios Xe+1

Published 2025-09-24 · Updated 2025-10-01 · CVE-2025-20160

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS Software and Cisco IOS XE Software (affected versions not specified)

Description A flaw exists in the implementation of the TACACS+ protocol that may allow a remote attacker to view sensitive data or bypass authentication. The issue arises because the system does not verify the configuration of the required TACACS+ shared secret. An attacker positioned between the communicating parties could intercept unencrypted TACACS+ messages or impersonate the TACACS+ server to falsely accept authentication requests. Successful exploitation could lead to the disclosure of sensitive information within TACACS+ messages or unauthorized access to the device.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

BDU:2025-11710

CVE-2025-20160

Affected Products

Cisco Ios

Cisco Ios Xe

References · 7

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-tacacs-hdB7thJw · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-11710 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-20160 · Security Note
• https://twitter.com/CVEnew/status/1970996085549371685 · Twitter Post
• https://twitter.com/0dayPublishing/status/1970903559844573349 · Twitter Post
• https://twitter.com/0dayPublishing/status/1973431160463126717 · Twitter Post
• https://twitter.com/leftSECURE/status/1971300024782111038 · Twitter Post