CVE-2025-1240

Code execution via malformed 7Z archive parsing

Published Feb 11, 2025 · Updated Feb 12, 2025

Out-of-bounds write in WinZip 28.0 16022 allows remote attackers to execute code through a crafted 7Z archive. The 7Z parser fails to validate user-supplied data against the allocated buffer and writes beyond its end. Exploitation requires the target to visit a malicious page or open a malicious file, and resulting code runs in the current process context.

CVSS severity7.8
High
EPSS probability10.31%
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 write in WinZip 28.0 16022 allows remote attackers to execute code through a crafted 7Z archive. The 7Z parser fails to validate user-supplied data against the allocated buffer and writes beyond its end. Exploitation requires the target to visit a malicious page or open a malicious file, and resulting code runs in the current process context.

The record

CVE
CVE-2025-1240
Published
Feb 11, 2025
Updated
Feb 12, 2025
Vendor
WinZip Computing
Product
WinZip
Classifications
CWE-787, T1203, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 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=28.0 16022

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

WinZip Computing · WinZipversion=28.0 16022

Published CVSS scores

7.8Zero Day InitiativeCVSS:3.0/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.

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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-787Out-of-bounds Write
T1203Exploitation for Client Execution
T1204.002User Execution: Malicious 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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