CVE-2022-26336: A carefully crafted TNEF file can cause an out of memory exception

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-03-04 · updated 2026-06-17
Weakness: CWE-20

Description

A shortcoming in the HMEF package of poi-scratchpad (Apache POI) allows an attacker to cause an Out of Memory exception. This package is used to read TNEF files (Microsoft Outlook and Microsoft Exchange Server). If an application uses poi-scratchpad to parse TNEF files and the application allows untrusted users to supply them, then a carefully crafted file can cause an Out of Memory exception. This issue affects poi-scratchpad version 5.2.0 and prior versions. Users are recommended to upgrade to poi-scratchpad 5.2.1.

Affected products

Apache Software Foundation Apache POI: before 5.2.1 — fixed in 5.2.1
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache POI 5.2.1. Check the vendor advisory for mitigations.

References

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