CVE-2026-4430
📛 CVE Title
Heap Buffer Overflow in AgileEngine
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- Document Fdn.
- CVSS severity
- MEDIUM
- CVSS score
- 5.4 / 10
- CVSS vector
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- Effective score
- 5.4 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-787 - Reserved
- 2026-03-19
- Published
- 2026-05-07 09:16 UTC
- Last updated
- 2026-05-07 15:03 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/4xxx/CVE-2026-4430.json
- Linked Threat
- CVE-2026-4430 — CVE-2026-4430
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-07 08:16:00 UTC
- NVD last modified
- 2026-05-08 16:48:01 UTC
- NVD CVSS v3.1
- 7.8 / 10 HIGH source: nvd@nist.gov
- NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Exploitability subscore
- 1.8 / 10
- Impact subscore
- 5.9 / 10
- EPSS score
- 0.0002 (probability of exploitation in next 30 days)
- EPSS percentile
- 4.19% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:14 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-28327 - Assigner
- Document Fdn.
- Published
- May 7, 2026, 7:16:18 AM
- Updated
- May 7, 2026, 1:03:05 PM
- EUVD base score (CVSS 4.0)
-
5.4 / 10
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 - EUVD-reported EPSS
- 0.0200
- Vendors
- The Document Foundation
- Products
-
libreoffice (26.2 <26.2.3)libreoffice (25.8 <25.8.7)libreoffice (26.2 <26.2.3)libreoffice (25.8 <25.8.7)
ENISA 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.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| The Document Foundation | LibreOffice |
26.2 (affected),
25.8 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
MITRE references (1) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/787.html rapid7:cwe.mitre.org
- https://attackerkb.com/topics/CVE-2026-4430 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28327 rapid7:euvd.enisa.europa.eu
- https://nvd.nist.gov/vuln/detail/CVE-2026-4430 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-4430 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (1)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://www.libreoffice.org/about-us/security/advisories/cve-2026-4430 security@documentfoundation.org Vendor Advisory
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:access.redhat.com
Learn about our open source products, services, and company. You are here
2026-05-23 21:01 UTC -
web:docs.fcc.gov
The Robocall Mitigation Database is a critical tool used by the Commission and state and federal law enforcement to combat illegal robocalls. The proposed rules, which the Chairwoman shared today with her colleagues, continue a Commission rulemaking in which 47 Attorneys General wrote the Commission in support of strong regulatory actions to ...
2026-05-23 21:01 UTC -
web:nvd.nist.gov
Vulnerabilities All vulnerabilities in the NVD have been assigned a CVE identifier and thus, abide by the definition below. CVE defines a vulnerability as: "A weakness in the computational logic (e.g., code) found in software and hardware components that, when exploited, results in a negative impact to confidentiality, integrity, or availability. Mitigation of the vulnerabilities in this ...
2026-05-23 21:01 UTC -
web:securityvulnerability.io
Explore vulnerability CVE - 2026 -44430 in MCP Registry exposing users to network risks. Learn more about the implications and fixes.
2026-05-23 21:01 UTC -
web:support.servicenow.com
ServiceNow Posture July, 2024 Description ServiceNow has addressed an input validation vulnerability that was identified in Vancouver and Washington, D.C. Now Platform releases. This vulnerability could
2026-05-23 21:01 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-05-23 21:01 UTC -
web:www.fema.gov
The Federal Emergency Management Agency (FEMA) recognizes that after a disaster, the best time to protect a facility from future damage is during the recovery period. Mitigation projects done during disaster recovery reduce overall cost and construction efforts associated with retrofitting a repaired facility.
2026-05-23 21:01 UTC -
web:www.majorgeeks.com
Windows Defender may try to remove a virus, trojan, or other malware and return a message stating Remediation incomplete. Remediation incomplete leads one to assume that a virus, trojan or malware was found, but not removed.
2026-05-23 21:01 UTC -
web:www.microsoft.com
Many organizations utilize third-party apps for identity security solutions to automate and unburden overtaxed IT admins from tedious tasks that employees can perform via self-service without IT assistance. But in September 2021, our researchers observed threat actors exploiting one such third-party ...
2026-05-23 21:01 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 21:01 UTC -
web:access.redhat.com
The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .
2026-05-26 02:48 UTC -
web:blog.qualys.com
Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.
2026-05-26 02:48 UTC -
web:community.ui.com
Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...
2026-05-26 02:48 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-26 02:48 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-05-26 02:48 UTC -
web:www.fema.gov
Public Assistance hazard mitigation provides funding to protect damaged public infrastructure from future events and helps communities build back better. Hazard mitigation is part of the post-disaster Public Assistance grant; it is not a separate application or grant program.
2026-05-26 02:48 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-05-26 02:48 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-4430.json.
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