CVE-2025-4539: A vulnerability was found in Hainan ToDesk 4.7.6.3

Routine

HIGH 7.0DOWNGRADE

CVE-2025-4539 is a high-severity flaw (CVSS 7.0) affecting todesk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Hainan ToDesk 4.7.6.3. It has been declared as critical. This vulnerability affects unknown code in the library profapi.dll of the component DLL File Parser. The manipulation leads to uncontrolled search path. It is possible to launch the attack on the local host. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The vend

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.0 (High)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-426, CWE-427
Published	2025-05-11
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: todesk

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-11 11:15 UTCPublished CVE record published
2026-06-17 09:33 UTCUpdated Record last modified

todesk todesk DOWNGRADE

Affected: 4.7.6.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.7.6.3

1. Check installed version

apt-cache policy todesk || rpm -q todesk || todesk --version

2. No fixed release: DOWNGRADE to a release before 4.7.6.3 (Debian / Ubuntu)

apt-cache madison todesk sudo apt install todesk=<VERSION_BEFORE_4.7.6.3> sudo apt-mark hold todesk

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list todesk sudo dnf downgrade todesk-<VERSION_BEFORE_4.7.6.3> sudo dnf versionlock add todesk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-4539?

todesk: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-4539 being exploited?

CVE-2025-4539 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-4539 affect?

CVE-2025-4539 affects todesk. Severity is high (CVSS 7.0). A vulnerability was found in Hainan ToDesk 4.7.6.3. It has been declared as critical. This vulnerability affects unknown code in the library profapi.dll of the component DLL File Parser. The manipulation leads to uncontrolled search path. I

How urgent is CVE-2025-4539?

Priority 28/100. High severity

Related CVEs

CVE-2024-44542 CRITICAL 9.8 DOWNGRADE SQL Injection vulnerability in todesk v.1.1 allows a remote attacker to execute arbitrary code via the /todesk

References

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