CVE-2026-23563

Protected file deletion via followed RPC junction

Published Jan 29, 2026 · Updated Jan 29, 2026

Link-following in TeamViewer DEX 1E Client before 26.1 on Windows allows local users to delete protected system files via crafted links. The 1E-Explorer-TachyonCore-DeleteFileByPath instruction follows an RPC control junction or symbolic link before deleting its resolved target. A low-privileged Windows user must prepare the link and induce execution of the privileged instruction; successful exploitation deletes protected files and can interrupt the host.

CVSS severity5.7
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link-following in TeamViewer DEX 1E Client before 26.1 on Windows allows local users to delete protected system files via crafted links. The 1E-Explorer-TachyonCore-DeleteFileByPath instruction follows an RPC control junction or symbolic link before deleting its resolved target. A low-privileged Windows user must prepare the link and induce execution of the privileged instruction; successful exploitation deletes protected files and can interrupt the host.

The record

CVE
CVE-2026-23563
Published
Jan 29, 2026
Updated
Jan 29, 2026
Vendor
TeamViewer
Product
TeamViewer DEX Client
Classifications
CWE-59, T1070.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <26.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TeamViewer · TeamViewer DEX Clientversion=0 <26.1

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
5.7TeamViewer Germany GmbHCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H

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.

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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-59Improper Link Resolution Before File Access ('Link Following')
T1070.004File Deletion

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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