CVE-2026-41034
Untrusted Pointer Dereference in ONLYOFFICE XLS Processing Causes Info Leak
Publication date: 2026-04-16
Last updated on: 2026-04-16
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| onlyoffice | documentserver | to 9.3.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.