Is CVE-2026-0394 actively exploited?

No active exploitation of CVE-2026-0394 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-0394 be exploited remotely?

Yes. CVE-2026-0394 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-0394?

CVE-2026-0394 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-0394

CWE-22Published: March 27, 2026· Updated: Mar 30, 2026

5.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.3th

Official Description

When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading /etc/passwd (or some other path which ends with passwd). If this file contains passwords, it can be used to authenticate wrongly, or if this is userdb, it can unexpectly make system users appear valid users. Upgrade to fixed version, or use different authentication scheme that does not rely on paths. Alternatively you can also ensure that the per-domain passwd files are in some other location, such as /etc/dovecot/auth/%d. No publicly available exploits are known.

NVD Source

Technical Analysis

CVE-2026-0394 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.