CVE-2024-7788

Signature forgery via ZIP repair reconstruction

Published Sep 17, 2024 · Updated Oct 12, 2024

Digital signature validation in LibreOffice 24.2 before 24.2.5 allows attackers to forge document trust via a crafted ZIP-based file. Repair mode reconstructs a corrupt ZIP central directory by scanning local file headers but then reports a signature status that does not authenticate the recovered content. Opening the crafted document and accepting repair is required, and the false status can mislead users about the integrity of recovered content.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Digital signature validation in LibreOffice 24.2 before 24.2.5 allows attackers to forge document trust via a crafted ZIP-based file. Repair mode reconstructs a corrupt ZIP central directory by scanning local file headers but then reports a signature status that does not authenticate the recovered content. Opening the crafted document and accepting repair is required, and the false status can mislead users about the integrity of recovered content.

The record

CVE
CVE-2024-7788
Published
Sep 17, 2024
Updated
Oct 12, 2024
Vendor
The Document Foundation
Product
LibreOffice
Classifications
CWE-347, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 12, 2024Record 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=24.2 << 24.2.5
  2. Affected versionversion=24.2 <24.2.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Document Foundation · LibreOfficeversion=24.2 << 24.2.5; version=24.2 <24.2.5

Published CVSS scores

7.8The Document FoundationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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