CVE detail
CVE-2026-14191
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.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 17.9 · diversity 20.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 5
- within the 30d window
- Peak daily
- 3
- highest bucket
Evidence
Source links by recency
5 source links · newest first
- CVE-2026-14191 WinRAR / UnRAR RAR5 recovery-volume (.rev) out-of-bounds heap write in RecVolumes5::ReadHeaderMicrosoft MSRC
Information published.
vendormsrc.microsoft.comJul 9, 2026, 8:02 AM - WinRAR flaw could allow attackers to take control of your computerMalwarebytes Labs
A new WinRAR update fixes a serious security flaw, but without automatic updates many users could miss the patch.
newswww.malwarebytes.comJul 2, 2026, 12:38 PM No excerpt available.
Exploitwww.securin.ioJul 1, 2026, 4:16 AM- https://www.rarlab.com/download.htmwww.rarlab.com
No excerpt available.
referencewww.rarlab.comJul 1, 2026, 4:16 AM - https://nvd.nist.gov/vuln/detail/CVE-2023-40477nvd.nist.gov
No excerpt available.
Third Party Advisorynvd.nist.govJul 1, 2026, 4:16 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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