Is CVE-2026-6443 actively exploited?

No active exploitation of CVE-2026-6443 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6443 be exploited remotely?

Yes. CVE-2026-6443 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6443?

CVE-2026-6443 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-6443

CWE-506Published: April 17, 2026· Updated: Apr 22, 2026

9.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.6th

Official Description

All plugins by Essentialplugin for WordPress are vulnerable to an injected backdoor in various versions. This is due to the plugin being sold to a malicious threat actor that embedded a backdoor in all of the plugin's they acquired. This makes it possible for the threat actor to maintain a persistent backdoor and inject spam into the affected sites.

NVD Source

Technical Analysis

CVE-2026-6443 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.