{"answers":{"affected":"It affects 6 products.","exploited":"Yes. Attackers have exploited CVE-2021-33739 in the wild since at least 3 Nov 2021.","fix":"No fix has been published for CVE-2021-33739 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-33739 is a high-severity vulnerability in Microsoft Windows 10 20h2, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-33739 and fix it if it is affected.\n\nWhat it is: CVE-2021-33739 is a high-severity vulnerability in Microsoft Windows 10 20h2, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-33739 in the wild since at least 3 Nov 2021.\n\nAffected product: Microsoft Windows 10 20h2. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-33739/ (Markdown: https://insights.sbomify.com/CVE-2021-33739/index.md)","id":"CVE-2021-33739","markdown":"https://insights.sbomify.com/CVE-2021-33739/index.md","name":"CVE-2021-33739","record":{"aliases":["GHSA-4mwq-m8xw-34mr"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Windows DWM Core Library","requires_auth":"none","summary":"An attacker can exploit a vulnerability in the Microsoft DWM Core Library to elevate privileges on affected Windows systems.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"windows_10_1909","vendor":"microsoft"},{"product":"windows_10_2004","vendor":"microsoft"},{"product":"windows_10_20h2","vendor":"microsoft"},{"product":"windows_10_21h1","vendor":"microsoft"},{"product":"windows_server_2004","vendor":"microsoft"},{"product":"windows_server_20h2","vendor":"microsoft"}],"cvss":{"score":8.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C","version":"3.1"},"cwes":[],"description":"Microsoft DWM Core Library Elevation of Privilege Vulnerability","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-06-09","github_poc":2,"max_poc_stars":10,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-06-09T11:40:56Z","kind":"github_poc","ref":"https://github.com/freeide2017/CVE-2021-33739-POC","stars":10,"title":null},{"date":"2021-09-24T03:33:02Z","kind":"github_poc","ref":"https://github.com/giwon9977/CVE-2021-33739_PoC_Analysis","stars":5,"title":"CVE-2021-33739 PoC Analysis"}],"tier":"exploited"},"has_fix":null,"headline":"Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation","id":"CVE-2021-33739","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","product":"Windows","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Microsoft","vulnerabilityName":"Microsoft Desktop Window Manager (DWM) Core Library Privilege Escalation Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"microsoft:windows_10_20h2","products":["microsoft:windows_10_20h2","microsoft:windows_10_21h1","microsoft:windows_server_20h2"],"type":"privilege_escalation","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Windows Media Remote Code Execution Vulnerability","id":"CVE-2021-33740"},"packages":[],"prev":{"headline":"Information disclosure in JT2Go","id":"CVE-2021-33738"},"products":["Windows 10 Version 1909","Windows 10 Version 2004","Windows 10 Version 20H2","Windows 10 Version 21H1","Windows Server version 2004","Windows Server version 20H2"],"published":"2021-06-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["Microsoft"]},"summary":"An attacker can exploit a vulnerability in the Microsoft DWM Core Library to elevate privileges on affected Windows systems.","url":"https://insights.sbomify.com/CVE-2021-33739/"}