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

317

Updates (KBs)

Actively exploited (KEV)

Critical Severity

CVEs affecting Windows 10 Version 21H2

CVE	Severity	CVSS	EPSS	Status
CVE-2024-49039	High	8.8	84%	KEVRansomware
CVE-2024-43451	Medium	6.5	84%	KEV
CVE-2024-43639	Critical	9.8	84%	-
CVE-2024-43627	High	8.8	84%	-
CVE-2024-43628	High	8.8	84%	-
CVE-2024-43620	High	8.8	84%	-
CVE-2024-43621	High	8.8	84%	-
CVE-2024-43622	High	8.8	84%	-
CVE-2024-43624	High	8.8	84%	-
CVE-2024-43635	High	8.8	84%	-
CVE-2026-41096	Critical	9.8	80%	-
CVE-2026-32209	Critical	9.8	80%	-
CVE-2025-54518	Critical	9.8	80%	-
CVE-2026-40402	Critical	9.3	80%	-
CVE-2024-43625	High	8.1	84%	-
CVE-2024-43447	High	8.1	84%	-
CVE-2025-21293	High	8.8	81%	-
CVE-2024-43530	High	7.8	84%	-
CVE-2024-43623	High	7.8	84%	-
CVE-2024-43626	High	7.8	84%	-
CVE-2024-43630	High	7.8	84%	-
CVE-2024-43644	High	7.8	84%	-
CVE-2024-49046	High	7.8	84%	-
CVE-2024-43629	High	7.8	84%	-
CVE-2024-43636	High	7.8	84%	-
CVE-2024-43640	High	7.8	84%	-
CVE-2024-43641	High	7.8	84%	-
CVE-2024-43516	High	7.8	84%	-
CVE-2024-43528	High	7.8	84%	-
CVE-2024-49019	High	7.8	84%	-
CVE-2026-34329	High	8.8	80%	-
CVE-2026-40403	High	8.8	80%	-
CVE-2024-43452	High	7.5	84%	-
CVE-2024-43450	High	7.5	84%	-
CVE-2024-43642	High	7.5	84%	-
CVE-2024-43511	High	7.0	84%	-
CVE-2026-40415	High	8.1	80%	-
CVE-2024-43634	Medium	6.8	84%	-
CVE-2024-43637	Medium	6.8	84%	-
CVE-2024-43638	Medium	6.8	84%	-
CVE-2024-43643	Medium	6.8	84%	-
CVE-2024-43449	Medium	6.8	84%	-
CVE-2024-43646	Medium	6.7	84%	-
CVE-2024-43631	Medium	6.7	84%	-
CVE-2026-33834	High	7.8	80%	-
CVE-2026-34330	High	7.8	80%	-
CVE-2026-34333	High	7.8	80%	-
CVE-2026-34343	High	7.8	80%	-
CVE-2026-34344	High	7.8	80%	-
CVE-2026-34351	High	7.8	80%	-
CVE-2026-35415	High	7.8	80%	-
CVE-2026-35417	High	7.8	80%	-
CVE-2026-35418	High	7.8	80%	-
CVE-2026-35421	High	7.8	80%	-
CVE-2026-40377	High	7.8	80%	-
CVE-2026-40399	High	7.8	80%	-
CVE-2026-40407	High	7.8	80%	-
CVE-2026-40408	High	7.8	80%	-
CVE-2026-41088	High	7.8	80%	-
CVE-2026-33835	High	7.8	80%	-
CVE-2026-33837	High	7.8	80%	-
CVE-2026-33838	High	7.8	80%	-
CVE-2026-34334	High	7.8	80%	-
CVE-2026-34336	High	7.8	80%	-
CVE-2026-34337	High	7.8	80%	-
CVE-2026-34338	High	7.8	80%	-
CVE-2026-40382	High	7.8	80%	-
CVE-2026-40397	High	7.8	80%	-
CVE-2026-40398	High	7.8	80%	-
CVE-2026-33841	High	7.8	80%	-
CVE-2024-43633	Medium	6.5	84%	-
CVE-2026-35424	High	7.5	80%	-
CVE-2026-40406	High	7.5	80%	-
CVE-2026-32161	High	7.5	80%	-
CVE-2026-40414	High	7.4	80%	-
CVE-2026-40413	High	7.4	80%	-
CVE-2024-38203	Medium	6.2	84%	-
CVE-2026-40401	High	7.1	80%	-
CVE-2024-38264	Medium	5.9	84%	-
CVE-2026-33839	High	7.0	80%	-
CVE-2026-34331	High	7.0	80%	-
CVE-2026-34342	High	7.0	80%	-
CVE-2026-34345	High	7.0	80%	-
CVE-2026-34347	High	7.0	80%	-
CVE-2026-35416	High	7.0	80%	-
CVE-2026-40410	High	7.0	80%	-
CVE-2026-42825	High	7.0	80%	-
CVE-2026-34340	High	7.0	80%	-
CVE-2026-34341	High	7.0	80%	-
CVE-2026-32170	Medium	6.7	80%	-
CVE-2026-41097	Medium	6.7	80%	-
CVE-2026-21530	Medium	6.7	80%	-
CVE-2026-35422	Medium	6.5	80%	-
CVE-2026-40380	Medium	6.2	80%	-
CVE-2026-34339	Medium	5.5	80%	-
CVE-2026-35423	Medium	5.4	80%	-
CVE-2026-44815	Critical	9.8	54%	-
CVE-2026-45642	Critical	9.8	54%	-
CVE-2026-45657	Critical	9.8	54%	-
CVE-2026-47291	Critical	9.8	54%	-
CVE-2026-42904	Critical	9.6	54%	-
CVE-2025-10263	Critical	9.3	54%	-
CVE-2026-45602	Critical	9.1	54%	-
CVE-2026-42985	High	8.8	54%	-
CVE-2026-47289	High	8.8	54%	-
CVE-2026-47653	High	8.8	54%	-
CVE-2026-44810	High	8.4	54%	-
CVE-2026-45607	High	8.4	54%	-
CVE-2026-45641	High	8.4	54%	-
CVE-2026-47652	High	8.2	54%	-
CVE-2026-42974	High	8.1	54%	-
CVE-2026-42981	High	8.1	54%	-
CVE-2026-45599	High	8.1	54%	-
CVE-2026-45635	High	8.1	54%	-
CVE-2026-45588	High	7.9	54%	-
CVE-2026-47656	High	7.9	54%	-
CVE-2026-48568	High	7.9	54%	-
CVE-2026-48570	High	7.9	54%	-
CVE-2026-48573	High	7.9	54%	-
CVE-2026-48575	High	7.9	54%	-
CVE-2026-48576	High	7.9	54%	-
CVE-2026-48578	High	7.9	54%	-
CVE-2026-45654	High	7.9	54%	-
CVE-2026-33828	High	7.8	54%	-
CVE-2026-40404	High	7.8	54%	-
CVE-2026-40409	High	7.8	54%	-
CVE-2026-41092	High	7.8	54%	-
CVE-2026-42828	High	7.8	54%	-
CVE-2026-42837	High	7.8	54%	-
CVE-2026-42905	High	7.8	54%	-
CVE-2026-42916	High	7.8	54%	-
CVE-2026-42977	High	7.8	54%	-
CVE-2026-42978	High	7.8	54%	-
CVE-2026-42979	High	7.8	54%	-
CVE-2026-42980	High	7.8	54%	-
CVE-2026-42983	High	7.8	54%	-
CVE-2026-42986	High	7.8	54%	-
CVE-2026-42989	High	7.8	54%	-
CVE-2026-42991	High	7.8	54%	-
CVE-2026-44802	High	7.8	54%	-
CVE-2026-44803	High	7.8	54%	-
CVE-2026-44812	High	7.8	54%	-
CVE-2026-45487	High	7.8	54%	-
CVE-2026-45586	High	7.8	54%	-
CVE-2026-45592	High	7.8	54%	-
CVE-2026-45593	High	7.8	54%	-
CVE-2026-45605	High	7.8	54%	-
CVE-2026-45636	High	7.8	54%	-
CVE-2026-45637	High	7.8	54%	-
CVE-2026-45638	High	7.8	54%	-
CVE-2026-45656	High	7.8	54%	-
CVE-2026-45658	High	7.8	54%	-
CVE-2026-48574	High	7.8	54%	-
CVE-2026-48583	High	7.8	54%	-
CVE-2026-8863	High	7.8	54%	-
CVE-2026-42829	High	7.8	54%	-
CVE-2026-42910	High	7.8	54%	-
CVE-2026-44809	High	7.8	54%	-
CVE-2026-45600	High	7.8	54%	-
CVE-2026-42976	High	7.8	54%	-
CVE-2026-42908	High	7.5	54%	-
CVE-2026-42909	High	7.5	54%	-
CVE-2026-42913	High	7.5	54%	-
CVE-2026-42992	High	7.5	54%	-
CVE-2026-42993	High	7.5	54%	-
CVE-2026-44799	High	7.5	54%	-
CVE-2026-44801	High	7.5	54%	-
CVE-2026-45639	High	7.5	54%	-
CVE-2026-48563	High	7.5	54%	-
CVE-2026-49160	High	7.5	54%	-
CVE-2026-34335	High	7.0	54%	-
CVE-2026-41108	High	7.0	54%	-
CVE-2026-42836	High	7.0	54%	-
CVE-2026-42911	High	7.0	54%	-
CVE-2026-42912	High	7.0	54%	-
CVE-2026-42984	High	7.0	54%	-
CVE-2026-45596	High	7.0	54%	-
CVE-2026-45597	High	7.0	54%	-
CVE-2026-45598	High	7.0	54%	-
CVE-2026-45601	High	7.0	54%	-
CVE-2026-45603	High	7.0	54%	-
CVE-2026-45640	High	7.0	54%	-
CVE-2026-45653	High	7.0	54%	-
CVE-2026-47648	High	7.0	54%	-
CVE-2026-45608	Medium	6.8	54%	-
CVE-2026-50507	Medium	6.8	54%	-
CVE-2026-45585	Medium	6.8	54%	-
CVE-2026-42903	Medium	6.5	54%	-
CVE-2026-42907	Medium	6.5	54%	-
CVE-2026-50508	Medium	6.5	54%	-
CVE-2026-42906	Medium	5.5	54%	-
CVE-2026-42915	Medium	5.5	54%	-
CVE-2026-42968	Medium	5.5	54%	-
CVE-2026-42969	Medium	5.5	54%	-
CVE-2026-42970	Medium	5.5	54%	-
CVE-2026-42971	Medium	5.5	54%	-
CVE-2026-42972	Medium	5.5	54%	-
CVE-2026-42973	Medium	5.5	54%	-
CVE-2026-45594	Medium	5.5	54%	-
CVE-2026-45604	Medium	5.5	54%	-
CVE-2026-45606	Medium	5.5	54%	-
CVE-2026-45634	Medium	5.5	54%	-
CVE-2026-45595	Medium	5.4	54%	-
CVE-2026-42914	Medium	5.3	54%	-
CVE-2026-45655	Medium	5.3	54%	-
CVE-2025-54101	High	8.8	20%	-
CVE-2025-54106	High	8.8	20%	-
CVE-2025-54110	High	8.8	20%	-
CVE-2025-54918	High	8.8	20%	-
CVE-2025-54107	High	8.8	20%	-
CVE-2025-54113	High	8.8	20%	-
CVE-2025-54917	High	8.8	20%	-
CVE-2025-55234	High	8.8	20%	-
CVE-2025-59290	High	7.8	20%	-
CVE-2025-54102	High	7.8	20%	-
CVE-2025-54111	High	7.8	20%	-
CVE-2025-54894	High	7.8	20%	-
CVE-2025-54895	High	7.8	20%	-
CVE-2025-54913	High	7.8	20%	-
CVE-2025-54916	High	7.8	20%	-
CVE-2025-55228	High	7.8	20%	-
CVE-2025-53800	High	7.8	20%	-
CVE-2025-53801	High	7.8	20%	-
CVE-2025-54091	High	7.8	20%	-
CVE-2025-54092	High	7.8	20%	-
CVE-2025-54098	High	7.8	20%	-
CVE-2025-54912	High	7.8	20%	-
CVE-2025-55224	High	7.8	20%	-
CVE-2025-59502	High	7.5	20%	-
CVE-2025-54919	High	7.5	20%	-
CVE-2025-53805	High	7.5	20%	-
CVE-2025-54103	High	7.4	20%	-
CVE-2025-55236	High	7.3	20%	-
CVE-2025-54116	High	7.3	20%	-
CVE-2025-54911	High	7.3	20%	-
CVE-2025-59289	High	7.0	20%	-
CVE-2025-49734	High	7.0	20%	-
CVE-2025-54099	High	7.0	20%	-
CVE-2025-55223	High	7.0	20%	-
CVE-2025-53802	High	7.0	20%	-
CVE-2025-53807	High	7.0	20%	-
CVE-2025-54093	High	7.0	20%	-
CVE-2025-54112	High	7.0	20%	-
CVE-2025-54114	High	7.0	20%	-
CVE-2025-54115	High	7.0	20%	-
CVE-2025-59220	High	7.0	20%	-
CVE-2025-54105	High	7.0	20%	-
CVE-2025-59215	High	7.0	20%	-
CVE-2025-54108	High	7.0	20%	-
CVE-2025-59216	High	7.0	20%	-

Showing the 250 highest-risk of 317 CVEs. See all in the CVE reference.

Updates (KBs) for Windows 10 Version 21H2

Update	Released	Severity	CVSS	EPSS	CVEs	Status
KB5046616	2024-11-12	Critical	9.8	84%	37	KEVRansomware
KB5046698	2024-11-12	Critical	9.8	84%	37	KEVRansomware
KB5046613	2024-11-12	High	8.8	84%	31	KEVRansomware
KB5046633	2024-11-12	High	8.8	84%	34	KEVRansomware
KB5093998	2026-06-09	Critical	9.8	54%	158	-
KB5094126	2026-06-09	Critical	9.8	54%	107	-
KB5094127	2026-08-11	Critical	9.8	54%	149	-
KB5065306	2025-10-14	High	8.8	20%	59	-
KB5065425	2025-10-14	High	8.8	20%	61	-
KB5065426	2025-10-14	High	8.8	20%	64	-
KB5065429	2025-10-14	High	8.8	20%	49	-
KB5065431	2025-10-14	High	8.8	20%	50	-
KB5065432	2025-10-14	High	8.8	20%	59	-
KB5065474	2025-10-14	High	8.8	20%	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.

Most searched on Senserva right now

KB5099540: the full CVE list KB5099538: patch details KB5094123: the full CVE list KB5099539 install notes and severity CVE-2026-53412 exploit status KB5101650 download and what it fixes KB5120708 install notes and severity CVE-2026-55040 exploit status KB5101001: patch details KB5094128: the full CVE list