Teamviewer
CVE-2026-23570
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS 6.5 (MEDIUM). Attack vector: Adjacent Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to forged or nonsensical datetime prefixes and compromising log integrity and foren. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Log timestamp tampering in TeamViewer DEX Client versions prior to 26.1 allows adjacent network attackers to inject malicious UDP Sync commands that corrupt event timestamps, undermining log integrity and forensic investigation capabilities. This input validation flaw affects Windows deployments of the NomadBranch service and could enable attackers to obscure the timeline of malicious activities or create misleading audit trails. No patch is currently available for this medium-severity vulnerability.
Earlier versions of this analysis (1)
A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. [CVSS 6.5 MEDIUM]
RemediationAI
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Technical ContextAI · show details
Classified as CWE-20 (Improper Input Validation). Affects Digital Employee Experience. A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.
Executive ViewAI
CVE-2026-23570 presents notable security risk, a input validation vulnerability rated CVSS 6.5. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: deploy WAF rules, restrict network access, enable logging.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB