CVE-2025-4540: A vulnerability was found in MTSoftware C-Lodop 6.6.1.1 on Windows

Routine

HIGH 7.0DOWNGRADE

CVE-2025-4540 is a high-severity flaw (CVSS 7.0) affecting c-lodop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in MTSoftware C-Lodop 6.6.1.1 on Windows. It has been rated as critical. This issue affects some unknown processing of the component CLodopPrintService. The manipulation leads to unquoted search path. The attack needs to be approached locally. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 6.6.13 is

Why this priority

High severity
Public exploit reference

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	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-426, CWE-428
Published	2025-05-11
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: lodop

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 16:15 UTCPublished CVE record published
2026-06-17 09:33 UTCUpdated Record last modified

lodop c-lodop DOWNGRADE

Affected: 6.6.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.6.1.1

1. Check installed version

apt-cache policy c-lodop || rpm -q c-lodop || c-lodop --version

2. No fixed release: DOWNGRADE to a release before 6.6.1.1 (Debian / Ubuntu)

apt-cache madison c-lodop sudo apt install c-lodop=<VERSION_BEFORE_6.6.1.1> sudo apt-mark hold c-lodop

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

dnf --showduplicates list c-lodop sudo dnf downgrade c-lodop-<VERSION_BEFORE_6.6.1.1> sudo dnf versionlock add c-lodop

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-2025-4540?

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

Is CVE-2025-4540 being exploited?

CVE-2025-4540 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-2025-4540 affect?

CVE-2025-4540 affects c-lodop. Severity is high (CVSS 7.0). A vulnerability was found in MTSoftware C-Lodop 6.6.1.1 on Windows. It has been rated as critical. This issue affects some unknown processing of the component CLodopPrintService. The manipulation leads to unquoted search path. The attack ne

How urgent is CVE-2025-4540?

Priority 36/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

References

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