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CVE-2026-4430

Heap Buffer Overflow in AgileEngine

HIGH
7.8
CVSS Score
Published: May 7, 2026 at 07:16 AM UTC
Updated: June 17, 2026 at 10:56 AM UTC
2 products affected across 2 vendorsLibreofficeLibreOffice

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters. This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Libreoffice· Libreoffice
95%
25.8.0.0 ≤ v < 25.8.7.026.2.0.0 ≤ v < 26.2.3.0
LibreOffice· Document
60%
25.8 ≤ v < 25.8.726.2 ≤ v < 26.2.325.826.2
Affected range stops below 25.8.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 26.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.libreoffice.org/about-us/security/advisories/cve-2026-4430

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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