Is CVE-2026-2340 actively exploited?

No active exploitation of CVE-2026-2340 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2340 be exploited remotely?

Yes. CVE-2026-2340 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2340?

CVE-2026-2340 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-2340

CWE-280Published: May 27, 2026· Updated: May 28, 2026

6.5

CVSS v3.1

Official Description

A flaw was found in Samba’s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.

NVD Source

Technical Analysis

CVE-2026-2340 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.