Critical severity9.8NVD Advisory· Published Mar 1, 2021· Updated Jun 17, 2026
CVE-2021-25832
CVE-2021-25832
Description
A heap buffer overflow vulnerability inside of BMP image processing was found at [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v6.0.0. Using this vulnerability, an attacker is able to gain remote code executions on DocumentServer.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:onlyoffice:document_server:*:*:*:*:*:*:*:*Range: >=4.0.0-9,<=6.0.0
- ONLYOFFICE/DocumentServerdescription
- Range: v4.0.0-9-v6.0.0
Patches
Vulnerability mechanics
References
5- github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25832nvdExploitThird Party Advisory
- github.com/ONLYOFFICE/core/blob/v6.0.1.15/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cppnvdVendor Advisory
- github.com/ONLYOFFICE/core/blob/v6.0.1.15/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cppnvdVendor Advisory
- github.com/ONLYOFFICE/core/blob/v6.0.1.15/DesktopEditor/cximage/CxImage/ximabmp.cppnvdVendor Advisory
- github.com/ONLYOFFICE/core/blob/v6.0.1.15/DesktopEditor/cximage/CxImage/ximabmp.cppnvdVendor Advisory
News mentions
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