ZDI-26-783: LibreOffice PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
ZDI disclosed a LibreOffice PDF parsing out-of-bounds write that can run code if a user opens a malicious file.
The Zero Day Initiative published ZDI-26-783, an out-of-bounds write in LibreOffice's PDF file parser tracked as CVE-2026-63273. Remote attackers can execute arbitrary code if a user opens a malicious file or visits a malicious page. ZDI assigned a CVSS score of 7.8. The advisory does not report exploitation in the wild.
- LibreOffice PDF parser has an out-of-bounds write.
- User must open a malicious file or visit a malicious page.
- Tracked as CVE-2026-63273 with a ZDI CVSS score of 7.8.
- Advisory does not report active exploitation.
- CVEs
- CVE-2026-63273
- Vendors
- The Document Foundation
- Products
- LibreOffice
- Organizations
- Zero Day Initiative
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-63273 | Heap buffer overflow in LibreOffice Draw PDF import | 5.4 | — |
From the original article
This vulnerability allows remote attackers to execute arbitrary code on affected installations of LibreOffice. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 7.
zerodayinitiative.com
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