How severe is CVE-2025-64403?

CVE-2025-64403 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-64403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64403?

CVE-2025-64403 affects Apache Openoffice. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-64403 have an EU (EUVD) identifier?

Yes. CVE-2025-64403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-124980.

When was CVE-2025-64403 published?

CVE-2025-64403 was published on 2025-11-12 and last updated on 2026-06-17.

CVE-2025-64403

CVE-2025-64403 is a high-severity vulnerability in Apache Openoffice with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-124980
Weakness: CWE-862
Affected product: Apache Openoffice
Published: 2025-11-12
Last modified: 2026-06-17

Description

Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause such links to be loaded without prompt. This issue affects Apache OpenOffice: through 4.1.15. Users are recommended to upgrade to version 4.1.16, which fixes the issue.

Frequently asked questions

What is CVE-2025-64403?: Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause such links to be loaded without prompt. This issue affects Apache OpenOffice: through 4.1.15. Users are recommended to upgrade to version 4.1.16, which fixes the issue.
How severe is CVE-2025-64403?: CVE-2025-64403 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-64403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64403?: CVE-2025-64403 affects Apache Openoffice. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-64403 have an EU (EUVD) identifier?: Yes. CVE-2025-64403 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-124980.
When was CVE-2025-64403 published?: CVE-2025-64403 was published on 2025-11-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:openoffice:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Openoffice

CVE-2014-3524 — Critical (CVSS 9.3): Apache OpenOffice before 4.1.1 allows remote attackers to execute arbitrary commands and possibly have other…
CVE-2010-4643 — Critical (CVSS 9.3): Heap-based buffer overflow in Impress in OpenOffice.org (OOo) 2.x and 3.x before 3.3 allows remote attackers to cause a…
CVE-2010-4253 — Critical (CVSS 9.3): Heap-based buffer overflow in Impress in OpenOffice.org (OOo) 2.x and 3.x before 3.3 allows remote attackers to cause a…
CVE-2010-3454 — Critical (CVSS 9.3): Multiple off-by-one errors in the WW8DopTypography::ReadFromMem function in oowriter in OpenOffice.org (OOo) 2.x and…
CVE-2010-3453 — Critical (CVSS 9.3): The WW8ListManager::WW8ListManager function in oowriter in OpenOffice.org (OOo) 2.x and 3.x before 3.3 does not…
CVE-2010-3452 — Critical (CVSS 9.3): Use-after-free vulnerability in oowriter in OpenOffice.org (OOo) 2.x and 3.x before 3.3 allows remote attackers to…

All CVEs affecting Apache Openoffice →

Other CWE-862 (Missing Authorization) vulnerabilities

CVE-2026-0092 — Critical (CVSS 10.0): In Package Manager, there is a possible device lock controller bypass due to a missing permission check. This could…
CVE-2026-33712 — Critical (CVSS 10.0): Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the preview chat endpoint (POST…
CVE-2026-2031 — Critical (CVSS 10.0): An Improper Access Control vulnerability in several internal API endpoints for Google Cloud Application Integration…
CVE-2026-34976 — Critical (CVSS 10.0): Dgraph is an open source distributed GraphQL database. Prior to 25.3.1, the restoreTenant admin mutation is missing…
CVE-2025-30416 — Critical (CVSS 10.0): Sensitive data disclosure and manipulation due to missing authorization. The following products are affected: Acronis…
CVE-2025-45854 — Critical (CVSS 10.0): /server/executeExec of JEHC-BPM 2.0.1 allows attackers to execute arbitrary code via execParams.

Browse all CWE-862 (Missing Authorization) vulnerabilities →