CVE-2026-73209: Uncontrolled Recursion in Open-Xchange GmbH OX Dovecot Pro
Description
CVE-2026-73209 is a vulnerability in Open-Xchange GmbH OX Dovecot Pro where an attacker with valid credentials can send specially crafted compressed data that triggers uncontrolled recursion, causing the affected process to exhaust its stack and crash. This results in termination of the process and can lead to degradation or denial of service for the IMAP service. No public exploits are known for this vulnerability.
CVSS v3.1
Score 6.5medium
Affected software
Open-Xchange GmbH
OX Dovecot Pro
Open-Xchange GmbH
OX Dovecot CE
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves uncontrolled recursion triggered by crafted compressed data sent by an authenticated attacker to OX Dovecot Pro. The recursion exhausts the stack, causing the affected process to crash and terminate, impacting IMAP availability. The CVSS 3.1 score is 6.5, indicating a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. No official remediation level or patch information is provided in the available data.
Potential Impact
An attacker with valid credentials can cause a denial of service by crashing the IMAP process through stack exhaustion. This impacts service availability but does not affect confidentiality or integrity. No known exploits are publicly available, limiting immediate exploitation risk.
Mitigation Recommendations
No official patch or remediation guidance is provided in the available data. Users should monitor vendor advisories for updates and apply patches once available. Until then, restricting access to trusted users and monitoring for unusual activity may help reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- OX
- Date Reserved
- 2026-08-11T13:14:10.017Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a916f8dacd9273b49cf925c
Added to database: 08/28/2026, 11:22:53 UTC
Last enriched: 09/10/2026, 02:38:23 UTC
Last updated: 10/10/2026, 18:48:22 UTC
Views: 53
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