What’s Vulnerable › Vulnerabilities
CVE-2026-41034
- Severity: medium (CVSS 5.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-16 · updated 2026-10-26
- Weakness: CWE-125
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.
Affected products
- Ascensio ONLYOFFICE DocumentServer: before 9.3.0 — fixed in 9.3.0
How to fix
Upgrade to a fixed version: Ascensio ONLYOFFICE DocumentServer 9.3.0. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-41034 or the next vulnerability affects your stack