CVE-2025-64406Network attack vector

Crash via out-of-bounds CSV import write

Published Nov 12, 2025 · Updated Nov 12, 2025

Out-of-bounds writing in Apache OpenOffice 4.1.15 and earlier allows remote attackers to crash the application via a crafted CSV document. Apache has disclosed neither the CSV parser locus nor the malformed field condition that causes the write beyond its intended memory bounds. Exploitation requires a user to open the crafted document; the documented consequence is an application crash or corruption of other memory areas.

CVSS severity4.3
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds writing in Apache OpenOffice 4.1.15 and earlier allows remote attackers to crash the application via a crafted CSV document. Apache has disclosed neither the CSV parser locus nor the malformed field condition that causes the write beyond its intended memory bounds. Exploitation requires a user to open the crafted document; the documented consequence is an application crash or corruption of other memory areas.

The record

CVE
CVE-2025-64406
Published
Nov 12, 2025
Updated
Nov 12, 2025
Vendor
The Apache Software Foundation
Product
Apache OpenOffice
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.1.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache OpenOfficeversion=0 <=4.1.15

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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