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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-04-16
Last Modified
2026-04-16
Generated
2026-07-06
AI Q&A
2026-04-16
EPSS Evaluated
2026-07-05
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
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
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.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-41034. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart