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Vulnerability record · CVE-2022-29777 · published 2 June 2022

CVE-2022-29777: Onlyoffice core out-of-bounds write vulnerability

Onlyoffice · Core

Onlyoffice Document Server v6.0.0 and below and Core 6.1.0.26 and below were discovered to contain a heap overflow via the component DesktopEditor/fontengine/fontconverter/FontFileBase.h.

9.8 CVSS 3.1 Critical EPSS 6.9% · top 6.1% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
6.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Onlyoffice Document Server v6.0.0 and below and Core 6.1.0.26 and below were discovered to contain a heap overflow via the component DesktopEditor/fontengine/fontconverter/FontFileBase.h.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#601 Release NotesThird Party Advisory
https://github.com/ONLYOFFICE/core/commit/b17d5e860f30e8be2caeb0022b63be4c76660178 PatchThird Party Advisory
https://github.com/moehw/poc_exploits/tree/master/CVE-2022-29777 ExploitThird Party Advisory
https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#601 Release NotesThird Party Advisory
https://github.com/ONLYOFFICE/core/commit/b17d5e860f30e8be2caeb0022b63be4c76660178 PatchThird Party Advisory
https://github.com/moehw/poc_exploits/tree/master/CVE-2022-29777 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-29777), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.