CVE-2026-41034
Received Received - Intake
Untrusted Pointer Dereference in ONLYOFFICE XLS Processing Causes Info Leak

Publication date: 2026-04-16

Last updated on: 2026-04-16

Assigner: MITRE

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.
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Meta Information
Published
2026-04-16
Last Modified
2026-04-16
Generated
2026-06-16
AI Q&A
2026-04-16
EPSS Evaluated
2026-06-15
NVD
CVE-2026-41034
EUVD
EUVD-2026-23199
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
onlyoffice documentserver to 9.3.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in ONLYOFFICE DocumentServer versions before 9.3.0. It involves an untrusted pointer dereference during XLS file processing or conversion, specifically through functions like pictFmla.cbBufInCtlStm and other related vectors. This flaw can lead to an information leak and allows bypassing Address Space Layout Randomization (ASLR), a security technique designed to prevent exploitation.

Impact Analysis

The vulnerability can lead to an information leak, meaning sensitive data could be exposed to unauthorized parties. Additionally, by bypassing ASLR, attackers may be able to more easily exploit the system, potentially increasing the risk of further attacks or unauthorized access.

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