7-Zip before 26.06 contains a heap out-of-bounds write vulnerability in the LZX decoder that lets attackers corrupt memory when a continuation CAB volume declares a smaller window. Attackers can entice victims to extract crafted multi-volume CAB archives, where a stale _pos value bypasses bounds checks, enabling arbitrary code execution.
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Affected Vendors & Products
Advisories
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Fixes
Solution
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Workaround
No workaround given by the vendor.
References
History
Tue, 10 Nov 2026 12:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 7-Zip before 26.06 contains a heap out-of-bounds write vulnerability in the LZX decoder that lets attackers corrupt memory when a continuation CAB volume declares a smaller window. Attackers can entice victims to extract crafted multi-volume CAB archives, where a stale _pos value bypasses bounds checks, enabling arbitrary code execution. | |
| Title | 7-Zip before 26.06 Heap Out-of-Bounds Write via LZX Decoder in CAB Extraction | |
| First Time appeared |
7-zip
7-zip 7-zip |
|
| Weaknesses | CWE-787 | |
| CPEs | cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:* | |
| Vendors & Products |
7-zip
7-zip 7-zip |
|
| References |
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|
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-10T12:04:02.382Z
Reserved: 2026-11-10T11:57:45.504Z
Link: CVE-2026-125742
No data.
Status : Awaiting Analysis
Published: 2026-11-10T12:17:18.893
Modified: 2026-11-10T12:17:19.043
Link: CVE-2026-125742
No data.
OpenCVE Enrichment
No data.
Weaknesses