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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-4430

31
FAUCET Score

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.

First published: May 7, 2026Last modified: May 7, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 25.8, < 25.8.7CPE match
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
>= 26.2, < 26.2.3CPE match
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
>= 25.8.0.0, < 25.8.7.0CPE matchmatch criteria
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
>= 26.2.0.0, < 26.2.3.0CPE matchmatch criteria
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.4MEDIUM

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
VS Confidentiality
LOW
VS Integrity
LOW
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.08%
Probability of exploitation in next 30 days
EPSS Percentile
0.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0008 is in the 0th percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

ubuntupatch availablevia ubuntu_usn
Product: libreoffice (jammy)Fixed in: 1:7.3.7-0ubuntu0.22.04.11
ubuntupatch availablevia ubuntu_usn
Product: libreoffice (noble)Fixed in: 4:24.2.7-0ubuntu0.24.04.5
ubuntupatch availablevia ubuntu_usn
Product: libreoffice (questing)Fixed in: 4:25.8.7-0ubuntu0.25.10.1
ubuntupatch availablevia ubuntu_usn
Product: libreoffice (resolute)Fixed in: 4:26.2.3.2-0ubuntu0.26.04.1

Vendor Advisories (2)

ubuntuUSN-8352-1

LibreOffice vulnerability

Jun 1, 2026
ubuntuUSN-8340-1

LibreOffice vulnerability

May 28, 2026

References

libreoffice.org / about-us/security/advisories/cve-2026-4430
Vendor Advisory