CVE-2026-27856
CVE-2026-27856
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.4EPSS 0.3%KEV nãoPoC —Patch referenciado
Lifecycle
Mar 27, 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
Open-Xchange GmbH · OX Dovecot ProWant to know if your infrastructure is exposed to this?
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