Improper TLS Certificate Validation RCE via Malicious Update in DeskTime Time Tracking App

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Summary

CVECVE-2025-10539
StatePUBLISHED
AssignerSEC-VLab
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-28 09:16:16 UTC
Updated2026-04-28 09:16:16 UTC
DescriptionDue to improper TLS certificate validation in the DeskTime Time Tracking App before version 1.3.674, attackers who can position themselves in the network path between the client and the DeskTime update servers can return a malicious executable in response to an update request. This allows the attacker to achieve user-level remote code execution on the affected client.

Risk And Classification

Problem Types: CWE-295 | CWE-296 | CWE-494 | CWE-295 CWE-295 Improper certificate validation | CWE-296 CWE-296 Improper following of a certificate's chain of trust | CWE-494 CWE-494 Download of code without integrity check

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA DeskTime DeskTime Time Tracking App affected 1.3.674 semver Not specified

References

ReferenceSourceLinkTags
r.sec-consult.com/desktime 551230f0-3615-47bd-b7cc-93e92e730bbf r.sec-consult.com
desktime.com/download 551230f0-3615-47bd-b7cc-93e92e730bbf desktime.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Daniel Hirschberger, SEC Consult Vulnerability Lab (en)

CNA: Thorger Jansen, SEC Consult Vulnerability Lab (en)

CNA: Tobias Niemann, SEC Consult Vulnerability Lab (en)

CNA: Marius Renner, SEC Consult Vulnerability Lab (en)

Additional Advisory Data

Solutions

CNA: The vendor provides a patched version v1.3.674 which can be obtained from: https://desktime.com/download

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