7.8

CVE-2026-14191

Medienbericht

WinRAR / UnRAR RAR5 recovery-volume (.rev) out-of-bounds heap write in RecVolumes5::ReadHeader

An out-of-bounds heap write exists in the RAR5 recovery-volume (.rev) parser in WinRAR and UnRAR (RecVolumes5::ReadHeader in recvol5.cpp). The RecItems vector is sized only when the first .rev file in a set is processed; subsequent .rev files supply an independent RecNum value that is validated against that file's own TotalCount field but never against the actual size of RecItems. A crafted set of two or more .rev files can therefore write an attacker-controlled 32-bit value (the header's RevCRC field) to RecItems[RecNum] at an attacker-controlled offset up to 65534 * sizeof(RecVolItem) bytes past the allocation, corrupting adjacent heap objects. Triggering requires the victim to run a recovery/test operation on an attacker-supplied .rev set (for example 'unrar t x.part1.rev', WinRAR 'Repair archive', or auto-recovery when extracting a volume set with a missing .rar part). This is the RAR5-path sibling of CVE-2023-40477 (which was fixed in the RAR3 path only in WinRAR 6.23). Fixed in WinRAR / RAR 7.23.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerRARLAB
≫
Produkt WinRAR
Default Statusunaffected
Version 0
Version < 7.23
Status affected
HerstellerRARLAB
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Produkt RAR
Default Statusunaffected
Version 0
Version < 7.23
Status affected
HerstellerRARLAB
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Produkt UnRAR
Default Statusunaffected
Version <= 7.21
Version 0
Status affected
HerstellerRARLAB
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Produkt UnRAR.dll
Default Statusunaffected
Version 0
Version < 7.23
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.31% 0.224
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
33c584b5-0579-4c06-b2a0-8d8329fcab9c 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-129 Improper Validation of Array Index

The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

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VulnDex Intel
Media Report
06.07.2026 15:32
https://www.rarlab.com/download.htm
https://nvd.nist.gov/vuln/detail/CVE-2023-40477
https://www.securin.io/zero-days/cve-2026-14191-winrar-unrar-rar5-recovery-volume-rev-out-of-bounds-heap-write-in-recvolumes5-readheader