{"vulnerability": "cve-2021-31969", "sightings": [{"uuid": "43ce937d-66be-48cf-b91c-861ff13a5068", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "MISP/1c5c38d6-3401-41ac-be0e-4cf361fa6f51", "content": "", "creation_timestamp": "2025-09-25T00:36:28.000000Z"}, {"uuid": "e7ca71b8-26cd-4645-a894-b2ac0a16d228", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "published-proof-of-concept", "source": "https://t.me/cKure/13875", "content": "\u25a0\u25a0\u25a0\u25a0\u25a1 Exploitation of a kernel pool overflow from a restrictive chunk size (CVE-2021-31969).\n\nhttps://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/", "creation_timestamp": "2024-11-09T19:00:04.000000Z"}, {"uuid": "187fe26c-7ab9-46db-80ed-842a44940c73", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "published-proof-of-concept", "source": "https://t.me/reverseame/4705", "content": "Exploitation of a kernel pool overflow from a restrictive chunk size (CVE-2021-31969) #MemoryCorruption #WindowsVulnerability #CVE-2021-31969 #Exploit #KernelPoolOverflow https://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/", "creation_timestamp": "2026-08-03T02:13:57.918481Z"}, {"uuid": "11bb93a2-2655-4491-8aa4-0f57dacd2b62", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3893", "content": "#Threat_Research\nCVE-2021-31969:\nMicrosoft Windows Cloud Sync Engine CLDFLT Integer Underflow Privilege Escalation Vulnerability\nhttps://www.zerodayinitiative.com/blog/2021/7/19/cve-2021-31969-underflowing-in-the-clouds", "creation_timestamp": "2021-07-22T12:00:07.000000Z"}, {"uuid": "03aab08d-3476-4bf6-89d2-3193b19fb389", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "published-proof-of-concept", "source": "https://t.me/reverseame/4705", "content": "Exploitation of a kernel pool overflow from a restrictive chunk size (CVE-2021-31969) #MemoryCorruption #WindowsVulnerability #CVE-2021-31969 #Exploit #KernelPoolOverflow https://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/", "creation_timestamp": "2026-08-02T05:04:25.452932Z"}, {"uuid": "03c1b0ba-168b-4f7a-ab7b-fba5c2727d3e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "published-proof-of-concept", "source": "https://t.me/thehaking/2830", "content": "\u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0443\u043b\u0430 \u044f\u0434\u0440\u0430 \u043f\u0440\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u043c \u0440\u0430\u0437\u043c\u0435\u0440\u0435 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442\u0430 (CVE-2021-31969)\n\n\u0420\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u043e\u0448\u0438\u0431\u043e\u043a, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435\u043c \u043f\u0430\u043c\u044f\u0442\u0438, \u043f\u043e-\u043f\u0440\u0435\u0436\u043d\u0435\u043c\u0443 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u0435\u0440\u044c\u0435\u0437\u043d\u0443\u044e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0434\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438. \u0423\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435 \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0438\u0445 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0432\u044f\u0437\u0430\u043d\u043e \u0441 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435\u043c \u0437\u0430\u0449\u0438\u0442\u043d\u044b\u0445 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u043e\u0432 \u0438 \u0440\u0430\u0441\u0442\u0443\u0449\u0435\u0439 \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c\u044e \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c. \u0425\u043e\u0442\u044f \u0434\u043b\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0448\u0438\u0431\u043a\u0438 \u0437\u0430\u0447\u0430\u0441\u0442\u0443\u044e \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0442\u043e\u0442\u0438\u043f\u0430, \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u043e\u0433\u043e \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0433\u043e \u043e\u0431\u0445\u043e\u0434\u0438\u0442\u044c \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043a\u043e\u043d\u0442\u0440\u043c\u0435\u0440\u044b, \u0434\u0430\u0435\u0442 \u0446\u0435\u043d\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044f\u0445 \u043f\u0440\u043e\u0434\u0432\u0438\u043d\u0443\u0442\u044b\u0445 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u0432. \n\u042d\u0442\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e \u0434\u043b\u044f \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 cldflt.sys, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043a\u0430\u0436\u0434\u0443\u044e Patch Tuesday \u0441 \u0438\u044e\u043d\u044f. \u041f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0447\u0442\u043e \u043e\u043d \u0441\u0442\u0430\u043b \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u0432 \u043f\u043e\u0441\u043b\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430\u0445 clfs.sys \u0438 afd.sys. \u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043c\u044b \u0441\u0442\u0440\u0435\u043c\u0438\u043c\u0441\u044f \u043f\u043e\u0434\u0447\u0435\u0440\u043a\u043d\u0443\u0442\u044c \u0432\u0430\u0436\u043d\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 cldflt.sys \u0438 \u043f\u0440\u0438\u0437\u044b\u0432\u0430\u0435\u043c \u043a \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0439, \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0430 \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u0435 \u044d\u0442\u043e\u0433\u043e \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043d\u0438\u043c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432.\n\nhttps://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/\n\n\ud83d\udc49@thehaking", "creation_timestamp": "2026-08-28T00:00:58.821633Z"}, {"uuid": "0958305c-14b4-401a-b399-a1262d82bd0d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "https://t.me/thehaking/2830", "content": "\u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0443\u043b\u0430 \u044f\u0434\u0440\u0430 \u043f\u0440\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u043c \u0440\u0430\u0437\u043c\u0435\u0440\u0435 \u0444\u0440\u0430\u0433\u043c\u0435\u043d\u0442\u0430 (CVE-2021-31969)\n\n\u0420\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u043e\u0448\u0438\u0431\u043e\u043a, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u0435\u043c \u043f\u0430\u043c\u044f\u0442\u0438, \u043f\u043e-\u043f\u0440\u0435\u0436\u043d\u0435\u043c\u0443 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0441\u0435\u0440\u044c\u0435\u0437\u043d\u0443\u044e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0434\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438. \u0423\u0432\u0435\u043b\u0438\u0447\u0435\u043d\u0438\u0435 \u0441\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0438\u0445 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\u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0433\u043e \u043e\u0431\u0445\u043e\u0434\u0438\u0442\u044c \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043a\u043e\u043d\u0442\u0440\u043c\u0435\u0440\u044b, \u0434\u0430\u0435\u0442 \u0446\u0435\u043d\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044f\u0445 \u043f\u0440\u043e\u0434\u0432\u0438\u043d\u0443\u0442\u044b\u0445 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u0432. \n\u042d\u0442\u043e \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e \u0434\u043b\u044f \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 cldflt.sys, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043a\u0430\u0436\u0434\u0443\u044e Patch Tuesday \u0441 \u0438\u044e\u043d\u044f. \u041f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0447\u0442\u043e \u043e\u043d \u0441\u0442\u0430\u043b \u043e\u0431\u044a\u0435\u043a\u0442\u043e\u043c \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u0432 \u043f\u043e\u0441\u043b\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430\u0445 clfs.sys \u0438 afd.sys. \u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u043c\u044b \u0441\u0442\u0440\u0435\u043c\u0438\u043c\u0441\u044f \u043f\u043e\u0434\u0447\u0435\u0440\u043a\u043d\u0443\u0442\u044c \u0432\u0430\u0436\u043d\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 cldflt.sys \u0438 \u043f\u0440\u0438\u0437\u044b\u0432\u0430\u0435\u043c \u043a \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0439, \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043d\u0430 \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u0435 \u044d\u0442\u043e\u0433\u043e \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u044b\u0445 \u0441 \u043d\u0438\u043c \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432.\n\nhttps://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/\n\n\ud83d\udc49@thehaking", "creation_timestamp": "2026-08-27T09:00:03.886662Z"}, {"uuid": "abc0da56-656a-49b2-a4da-e588717bd54f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "https://t.me/reverseame/4705", "content": "Exploitation of a kernel pool overflow from a restrictive chunk size (CVE-2021-31969) #MemoryCorruption #WindowsVulnerability #CVE-2021-31969 #Exploit #KernelPoolOverflow https://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/", "creation_timestamp": "2026-07-29T12:02:11.325217Z"}, {"uuid": "93b83917-33e5-4f6a-9921-051a1718da3a", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "https://t.me/reverseame/4705", "content": "Exploitation of a kernel pool overflow from a restrictive chunk size (CVE-2021-31969) #MemoryCorruption #WindowsVulnerability #CVE-2021-31969 #Exploit #KernelPoolOverflow https://starlabs.sg/blog/2023/11-exploitation-of-a-kernel-pool-overflow-from-a-restrictive-chunk-size-cve-2021-31969/", "creation_timestamp": "2026-07-30T00:02:18.962927Z"}, {"uuid": "276eebb1-6b49-4f94-ac55-ada8c71c619f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "https://t.me/cissp/3868", "content": "exploit\nAn 0-day Exploit for HiveNightmare, which allows you to retrieve all registry hives in Windows 10/11 as a non-administrator user. There\u2019s no patches.\nhttps://github.com/GossiTheDog/HiveNightmare\n\n]-> https://doublepulsar.com/hivenightmare-aka-serioussam-anybody-can-read-the-registry-in-windows-10-7a871c465fa5\n\nThreat Research\nCVE-2021-31969:\nMicrosoft Windows Cloud Sync Engine CLDFLT Integer Underflow Privilege Escalation Vulnerability\nhttps://www.zerodayinitiative.com/blog/2021/7/19/cve-2021-31969-underflowing-in-the-clouds\n\nSCADA Security\nExploiting Vulnerabilities in CODESYS\u2019s Automation Server/WAGO PLC\nhttps://www.claroty.com/2021/07/21/blog-research-exploiting-vulnerabilities-in-the-ot-cloud-era", "creation_timestamp": "2026-09-01T17:00:45.611841Z"}, {"uuid": "2f08c46c-d7d7-4728-8f66-62a76b8f3eca", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-31969", "type": "seen", "source": "https://t.me/cissp/3868", "content": "exploit\nAn 0-day Exploit for HiveNightmare, which allows you to retrieve all registry hives in Windows 10/11 as a non-administrator user. There\u2019s no patches.\nhttps://github.com/GossiTheDog/HiveNightmare\n\n]-> https://doublepulsar.com/hivenightmare-aka-serioussam-anybody-can-read-the-registry-in-windows-10-7a871c465fa5\n\nThreat Research\nCVE-2021-31969:\nMicrosoft Windows Cloud Sync Engine CLDFLT Integer Underflow Privilege Escalation Vulnerability\nhttps://www.zerodayinitiative.com/blog/2021/7/19/cve-2021-31969-underflowing-in-the-clouds\n\nSCADA Security\nExploiting Vulnerabilities in CODESYS\u2019s Automation Server/WAGO PLC\nhttps://www.claroty.com/2021/07/21/blog-research-exploiting-vulnerabilities-in-the-ot-cloud-era", "creation_timestamp": "2026-09-02T01:04:32.398372Z"}]}