CVE-2025-10539 | Improper TLS Certificate Validation RCE via Malicious Update in DeskTime Time Tracking App

Exp

Due 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.

Published: 2026-04-28 Last update: 2026-05-18 Assigner: 551230f0-3615-47bd-b7cc-93e92e730bbf Source: 551230f0-3615-47bd-b7cc-93e92e730bbf
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-10539 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.06%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-10539

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-10539

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-09 0.02% 0.06% +0.04%
2 2026-04-28 — 0.02% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-10539

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 2.5 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-10539

GitHub Security Advisory for CVE-2025-10539

GHSA-m272-rh3v-6hfm · Severity: medium — Due to improper TLS certificate validation in the DeskTime Time Tracking App before version 1.3...

Affected software / configurations for CVE-2025-10539

Vendor Product Version Raw CPE
draugiemgroup desktime_time_tracking < 1.3.674 cpe:2.3:a:draugiemgroup:desktime_time_tracking:*:*:*:*:*:*:*:*

References for CVE-2025-10539

cvelogic Threat Intelligence