How severe is CVE-2026-23570?

CVE-2026-23570 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-2026-23570 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23570?

CVE-2026-23570 affects Teamviewer Digital Employee Experience. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23570?

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

Does CVE-2026-23570 have an EU (EUVD) identifier?

Yes. CVE-2026-23570 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4994.

When was CVE-2026-23570 published?

CVE-2026-23570 was published on 2026-01-29 and last updated on 2026-06-17.

CVE-2026-23570

CVE-2026-23570 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: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4994
Weakness: CWE-20
Affected product: Teamviewer Digital Employee Experience
Published: 2026-01-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-23570?: 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.
How severe is CVE-2026-23570?: CVE-2026-23570 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-2026-23570 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23570?: CVE-2026-23570 affects Teamviewer Digital Employee Experience. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23570?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23570 have an EU (EUVD) identifier?: Yes. CVE-2026-23570 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4994.
When was CVE-2026-23570 published?: CVE-2026-23570 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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