CVE-2025-20259

Arbitrary file deletion via updater symlink redirection

Published Jun 4, 2025 · Updated Jun 4, 2025

Path traversal in Cisco ThousandEyes Endpoint Agent for Windows before 2.3.3 allows local users to delete arbitrary files during upgrades. The Windows updater follows an attacker-created symbolic link during an agent upgrade and redirects its protected-file deletion operation to the link target. Exploitation requires authenticated local access and an upgrade event; successful exploitation deletes the chosen file and can disrupt the device.

CVSS severity5.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Cisco ThousandEyes Endpoint Agent for Windows before 2.3.3 allows local users to delete arbitrary files during upgrades. The Windows updater follows an attacker-created symbolic link during an agent upgrade and redirects its protected-file deletion operation to the link target. Exploitation requires authenticated local access and an upgrade event; successful exploitation deletes the chosen file and can disrupt the device.

The record

CVE
CVE-2025-20259
Published
Jun 4, 2025
Updated
Jun 4, 2025
Vendor
ClamAV
Product
Cisco ThousandEyes Endpoint Agent
Classifications
CWE-22, T1485
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=N/A

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

ClamAV · Cisco ThousandEyes Endpoint Agentversion=N/A

Published CVSS scores

5.3Cisco PSIRTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo