How severe is CVE-2026-23566?

CVE-2026-23566 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-23566 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23566?

CVE-2026-23566 affects Teamviewer Digital Employee Experience. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23566?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23566 have an EU (EUVD) identifier?

Yes. CVE-2026-23566 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4984.

When was CVE-2026-23566 published?

CVE-2026-23566 was published on 2026-01-29 and last updated on 2026-06-17.

CVE-2026-23566

CVE-2026-23566 is a medium-severity vulnerability in Teamviewer Digital Employee Experience with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4984
Weakness: CWE-20
Affected product: Teamviewer Digital Employee Experience
Published: 2026-01-29
Last modified: 2026-06-17

Description

A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to inject, tamper with, or forge log entries in \Nomad Branch.log via crafted data sent to the UDP network handler. This can impact log integrity and nonrepudiation.

Frequently asked questions

What is CVE-2026-23566?: A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to inject, tamper with, or forge log entries in \Nomad Branch.log via crafted data sent to the UDP network handler. This can impact log integrity and nonrepudiation.
How severe is CVE-2026-23566?: CVE-2026-23566 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-23566 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23566?: CVE-2026-23566 affects Teamviewer Digital Employee Experience. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23566?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23566 have an EU (EUVD) identifier?: Yes. CVE-2026-23566 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4984.
When was CVE-2026-23566 published?: CVE-2026-23566 was published on 2026-01-29 and last updated on 2026-06-17.

References

https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/

Affected products (1)

cpe:2.3:a:teamviewer:digital_employee_experience:*:*:*:*:*:*:*:*

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