CVE-2023-52168

Memory corruption via malformed NTFS update sequence

Published Jul 3, 2024 · Updated Nov 3, 2025

Heap-based buffer overflow in 7-Zip before 24.01 allows local users to corrupt memory by processing a crafted NTFS image with 7zz. CMftRec::Parse trusts attacker-controlled update-sequence and record-size fields, then restores two-byte sector values past its fixed 4096-byte ByteBuf. The full 7zz implementation or its library must parse the image; 7za and 7zr are unaffected, and reliable code execution is not established.

CVSS severity8.4
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in 7-Zip before 24.01 allows local users to corrupt memory by processing a crafted NTFS image with 7zz. CMftRec::Parse trusts attacker-controlled update-sequence and record-size fields, then restores two-byte sector values past its fixed 4096-byte ByteBuf. The full 7zz implementation or its library must parse the image; 7za and 7zr are unaffected, and reliable code execution is not established.

The record

CVE
CVE-2023-52168
Published
Jul 3, 2024
Updated
Nov 3, 2025
Vendor
7-Zip
Product
7-Zip
Classifications
CWE-122
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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 <24.01

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

7-Zip · 7-Zipversion=0 <24.01

Published CVSS scores

8.4CISA ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/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-122Heap-based Buffer Overflow

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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