EUVD-2026-67681
GHSA-r5w4-jgmp-fp92
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Network-reachable IMAP service, low complexity, authenticated (PR:L) required; only availability impact from process crash, no scope change.
Primary rating from Vendor (OX).
CVSS VectorVendor: OX
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation or denial of service for IMAP. Update to non-vulnerable version. No publicly available exploits are known.
AnalysisAI
Stack exhaustion via crafted compressed IMAP data in OX Dovecot Pro and OX Dovecot CE allows an authenticated remote attacker to crash the IMAP process, causing denial of service. The flaw (CWE-674, Uncontrolled Recursion) is triggered by sending specially constructed compressed payloads that exceed stack depth limits during decompression processing. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires valid IMAP credentials - at minimum a low-privilege mailbox account on the targeted server (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 6.5 (Medium) reflects an authenticated, network-exploitable denial-of-service with no confidentiality or integrity impact, which is an accurate characterization. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The vendor's primary guidance is to update to a non-vulnerable version of OX Dovecot Pro or OX Dovecot CE. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-674 – Uncontrolled Recursion
View allSame technique Denial Of Service
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External POC / Exploit Code
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