CVE-2026-41034

MEDIUM

ONLYOFFICE DocumentServer < 9.3.0 - Out-of-bounds Read in XLS Processing

Title source: llm

Description

ONLYOFFICE DocumentServer before 9.3.0 has an untrusted pointer dereference in XLS processing/conversion (via pictFmla.cbBufInCtlStm and other vectors), leading to an information leak and ASLR bypass.

References (1)

Core 1

Core References

https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md

View Writeup ZIP pw:eip

Scores

CVSS v3 5.0

EPSS 0.0029

EPSS Percentile 20.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-125

Status published

Products (1)

Ascensio/ONLYOFFICE DocumentServer < 9.3.0

Published Apr 16, 2026

Tracked Since Apr 16, 2026