FKIE_CVE-2026-14191
Vulnerability from fkie_nvd - Published: 2026-07-01 04:16 - Updated: 2026-07-01 14:16
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"platforms": [
"Windows"
],
"product": "WinRAR",
"vendor": "RARLAB",
"versions": [
{
"lessThan": "7.23",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"Linux",
"macOS"
],
"product": "RAR",
"vendor": "RARLAB",
"versions": [
{
"lessThan": "7.23",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows",
"Linux",
"macOS"
],
"product": "UnRAR",
"vendor": "RARLAB",
"versions": [
{
"lessThanOrEqual": "7.21",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"platforms": [
"Windows"
],
"product": "UnRAR.dll",
"vendor": "RARLAB",
"versions": [
{
"lessThan": "7.23",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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\u0027s 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\u0027s 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 \u0027unrar t x.part1.rev\u0027, WinRAR \u0027Repair archive\u0027, 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."
}
],
"id": "CVE-2026-14191",
"lastModified": "2026-07-01T14:16:39.587",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-14191",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-01T13:07:23.906784Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-01T04:16:58.647",
"references": [
{
"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40477"
},
{
"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
"url": "https://www.rarlab.com/download.htm"
}
],
"sourceIdentifier": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
"vulnStatus": "Received",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-129"
},
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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