Patch tracker / Products / Windows 10 Version 21H2

Windows 10 Version 21H2: vulnerabilities and security updates

Every CVE affecting Windows 10 Version 21H2 and the Microsoft update (KB) that fixes it, ranked by real-world risk. Actively exploited (CISA KEV) first, then EPSS exploit probability, on top of CVSS severity.

CVEs

152

Updates (KBs)

Actively exploited (KEV)

Critical Severity

CVEs affecting Windows 10 Version 21H2

CVE	Severity	CVSS	EPSS	Status
CVE-2024-49039	Critical	9.8	82%	KEVRansomware
CVE-2024-43451	Critical	9.8	82%	KEV
CVE-2024-43530	Critical	9.8	82%	-
CVE-2024-43623	Critical	9.8	82%	-
CVE-2024-43626	Critical	9.8	82%	-
CVE-2024-43627	Critical	9.8	82%	-
CVE-2024-43628	Critical	9.8	82%	-
CVE-2024-43630	Critical	9.8	82%	-
CVE-2024-43634	Critical	9.8	82%	-
CVE-2024-43637	Critical	9.8	82%	-
CVE-2024-43638	Critical	9.8	82%	-
CVE-2024-43643	Critical	9.8	82%	-
CVE-2024-43644	Critical	9.8	82%	-
CVE-2024-43449	Critical	9.8	82%	-
CVE-2024-43452	Critical	9.8	82%	-
CVE-2024-49046	Critical	9.8	82%	-
CVE-2024-43620	Critical	9.8	82%	-
CVE-2024-43621	Critical	9.8	82%	-
CVE-2024-43622	Critical	9.8	82%	-
CVE-2024-43624	Critical	9.8	82%	-
CVE-2024-43629	Critical	9.8	82%	-
CVE-2024-43635	Critical	9.8	82%	-
CVE-2024-43636	Critical	9.8	82%	-
CVE-2024-43640	Critical	9.8	82%	-
CVE-2024-43641	Critical	9.8	82%	-
CVE-2024-38203	Critical	9.8	82%	-
CVE-2024-43646	Critical	9.8	82%	-
CVE-2024-43631	Critical	9.8	82%	-
CVE-2024-43516	Critical	9.8	82%	-
CVE-2024-43528	Critical	9.8	82%	-
CVE-2024-43511	Critical	9.8	82%	-
CVE-2024-43625	Critical	9.8	82%	-
CVE-2024-43447	Critical	9.8	82%	-
CVE-2024-43450	Critical	9.8	82%	-
CVE-2024-43639	Critical	9.8	82%	-
CVE-2024-43642	Critical	9.8	82%	-
CVE-2024-49019	Critical	9.8	82%	-
CVE-2024-38264	Critical	9.8	82%	-
CVE-2024-43633	Critical	9.8	82%	-
CVE-2025-21293	Critical	9.8	81%	-
CVE-2025-59290	High	8.8	19%	-
CVE-2025-59502	High	8.8	19%	-
CVE-2025-59289	High	8.8	19%	-
CVE-2025-49734	High	8.8	19%	-
CVE-2025-53797	High	8.8	19%	-
CVE-2025-53798	High	8.8	19%	-
CVE-2025-54095	High	8.8	19%	-
CVE-2025-54096	High	8.8	19%	-
CVE-2025-54097	High	8.8	19%	-
CVE-2025-54099	High	8.8	19%	-
CVE-2025-54101	High	8.8	19%	-
CVE-2025-54102	High	8.8	19%	-
CVE-2025-54106	High	8.8	19%	-
CVE-2025-54110	High	8.8	19%	-
CVE-2025-54111	High	8.8	19%	-
CVE-2025-54894	High	8.8	19%	-
CVE-2025-54895	High	8.8	19%	-
CVE-2025-54913	High	8.8	19%	-
CVE-2025-54916	High	8.8	19%	-
CVE-2025-54918	High	8.8	19%	-
CVE-2025-54919	High	8.8	19%	-
CVE-2025-55223	High	8.8	19%	-
CVE-2025-55225	High	8.8	19%	-
CVE-2025-55226	High	8.8	19%	-
CVE-2025-55228	High	8.8	19%	-
CVE-2025-55236	High	8.8	19%	-
CVE-2025-53796	High	8.8	19%	-
CVE-2025-53799	High	8.8	19%	-
CVE-2025-53800	High	8.8	19%	-
CVE-2025-53801	High	8.8	19%	-
CVE-2025-53802	High	8.8	19%	-
CVE-2025-53803	High	8.8	19%	-
CVE-2025-53804	High	8.8	19%	-
CVE-2025-53805	High	8.8	19%	-
CVE-2025-53806	High	8.8	19%	-
CVE-2025-53807	High	8.8	19%	-
CVE-2025-53808	High	8.8	19%	-
CVE-2025-53810	High	8.8	19%	-
CVE-2025-54091	High	8.8	19%	-
CVE-2025-54092	High	8.8	19%	-
CVE-2025-54093	High	8.8	19%	-
CVE-2025-54094	High	8.8	19%	-
CVE-2025-54098	High	8.8	19%	-
CVE-2025-54104	High	8.8	19%	-
CVE-2025-54107	High	8.8	19%	-
CVE-2025-54109	High	8.8	19%	-
CVE-2025-54112	High	8.8	19%	-
CVE-2025-54113	High	8.8	19%	-
CVE-2025-54114	High	8.8	19%	-
CVE-2025-54115	High	8.8	19%	-
CVE-2025-54116	High	8.8	19%	-
CVE-2025-54911	High	8.8	19%	-
CVE-2025-54912	High	8.8	19%	-
CVE-2025-54915	High	8.8	19%	-
CVE-2025-54917	High	8.8	19%	-
CVE-2025-55224	High	8.8	19%	-
CVE-2025-55234	High	8.8	19%	-
CVE-2025-59220	High	8.8	19%	-
CVE-2025-48807	High	8.8	19%	-
CVE-2025-54103	High	8.8	19%	-
CVE-2025-54105	High	8.8	19%	-
CVE-2025-59215	High	8.8	19%	-
CVE-2025-53809	High	8.8	19%	-
CVE-2025-54108	High	8.8	19%	-
CVE-2025-59216	High	8.8	19%	-
CVE-2026-23667	High	8.8	4.7%	-
CVE-2026-23668	High	8.8	4.7%	-
CVE-2026-23669	High	8.8	4.7%	-
CVE-2026-23671	High	8.8	4.7%	-
CVE-2026-23672	High	8.8	4.7%	-
CVE-2026-23673	High	8.8	4.7%	-
CVE-2026-24282	High	8.8	4.7%	-
CVE-2026-24285	High	8.8	4.7%	-
CVE-2026-24287	High	8.8	4.7%	-
CVE-2026-24290	High	8.8	4.7%	-
CVE-2026-24291	High	8.8	4.7%	-
CVE-2026-24292	High	8.8	4.7%	-
CVE-2026-24294	High	8.8	4.7%	-
CVE-2026-24295	High	8.8	4.7%	-
CVE-2026-24296	High	8.8	4.7%	-
CVE-2026-24297	High	8.8	4.7%	-
CVE-2026-25165	High	8.8	4.7%	-
CVE-2026-25168	High	8.8	4.7%	-
CVE-2026-25169	High	8.8	4.7%	-
CVE-2026-25171	High	8.8	4.7%	-
CVE-2026-25172	High	8.8	4.7%	-
CVE-2026-25173	High	8.8	4.7%	-
CVE-2026-25174	High	8.8	4.7%	-
CVE-2026-25175	High	8.8	4.7%	-
CVE-2026-25176	High	8.8	4.7%	-
CVE-2026-25177	High	8.8	4.7%	-
CVE-2026-25178	High	8.8	4.7%	-
CVE-2026-25179	High	8.8	4.7%	-
CVE-2026-25180	High	8.8	4.7%	-
CVE-2026-25181	High	8.8	4.7%	-
CVE-2026-25185	High	8.8	4.7%	-
CVE-2026-25186	High	8.8	4.7%	-
CVE-2026-25187	High	8.8	4.7%	-
CVE-2026-25188	High	8.8	4.7%	-
CVE-2026-25189	High	8.8	4.7%	-
CVE-2026-25190	High	8.8	4.7%	-
CVE-2026-26111	High	8.8	4.7%	-
CVE-2026-26128	High	8.8	4.7%	-
CVE-2026-23674	High	8.8	4.7%	-
CVE-2026-24289	High	8.8	4.7%	-
CVE-2026-25170	High	8.8	4.7%	-
CVE-2026-26132	High	8.8	4.7%	-
CVE-2026-24293	High	8.8	4.7%	-
CVE-2026-24288	High	8.8	4.7%	-
CVE-2026-24283	High	8.8	4.7%	-
CVE-2026-25167	High	8.8	4.7%	-
CVE-2024-38163	High	7.8	0.7%	-

Updates (KBs) for Windows 10 Version 21H2

Update	Released	Severity	CVSS	EPSS	CVEs	Status
KB5046616	2024-11-12	Critical	9.8	82%	37	KEVRansomware
KB5046698	2024-11-12	Critical	9.8	82%	37	KEVRansomware
KB5046613	2024-11-12	High	8.8	82%	31	KEVRansomware
KB5046633	2024-11-12	High	8.8	82%	34	KEVRansomware
KB5065306	2025-10-14	High	8.8	19%	59	-
KB5065425	2025-10-14	High	8.8	19%	61	-
KB5065426	2025-10-14	High	8.8	19%	64	-
KB5065429	2025-10-14	High	8.8	19%	49	-
KB5065431	2025-10-14	High	8.8	19%	50	-
KB5065432	2025-10-14	High	8.8	19%	59	-
KB5065474	2025-10-14	High	8.8	19%	64	-
KB5078752	2026-03-10	High	8.8	4.7%	40	-
KB5078883	2026-03-10	High	8.8	4.7%	41	-
KB5078885	2026-03-10	High	8.8	4.7%	43	-
KB5079420	2026-03-10	High	8.8	4.7%	38	-
KB5079466	2026-03-10	High	8.8	4.7%	40	-
KB5079473	2026-03-10	High	8.8	4.7%	41	-
KB5042320	2024-08-13	High	7.8	0.7%	1	-
KB5042321	2024-08-13	High	7.8	0.7%	1	-
KB5042322	2024-08-13	High	7.8	0.7%	1	-

Ranked across all products on the Microsoft patch tracker and the CVE and vulnerability management reference. Browse every product: product index.

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