Is CVE-2026-3610 actively exploited?

No active exploitation of CVE-2026-3610 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3610 be exploited remotely?

Yes. CVE-2026-3610 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3610?

CVE-2026-3610 has a CVSS score of 4.3 (MEDIUM).

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MEDIUM

CVE-2026-3610

CWE-79Published: March 6, 2026· Updated: Mar 9, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.4th

Official Description

A vulnerability was found in HSC Cybersecurity Mailinspector up to 5.3.2-3. Affected by this issue is some unknown functionality of the file /mailinspector/mliUserValidation.php of the component URL Handler. The manipulation of the argument error_description results in cross site scripting. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 5.4.0 can resolve this issue. You should upgrade the affected component. The vendor was contacted early and responded very professional: "We have already implemented the fix and made a hotfix available to affected customers, ensuring mitigation while the official release 5.4.0 has not yet been published. This allows customers to address the issue immediately, outside the regular release cycle."

NVD Source

Technical Analysis

CVE-2026-3610 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.