Patch Tuesday: Microsoft security update releases

Microsoft publishes security updates on the second Tuesday of each month, and sometimes out of band. Each month links to its vulnerabilities, the exploited ones, and the advisories Microsoft revised afterwards.

Data is being collected: CVE counts per month appear when our import of the Security Update Guide has reached the present.

ReleaseReleased
November 202610 November 2026
October 202613 October 2026
September 20268 September 2026
August 202611 August 2026
July 202614 July 2026
June 20269 June 2026
May 202612 May 2026
April 202614 April 2026
March 202610 March 2026
February 202610 February 2026
January 202613 January 2026
December 20259 December 2025
November 202511 November 2025
October 202514 October 2025
September 20259 September 2025
August 202512 August 2025
July 20258 July 2025
June 202510 June 2025
May 202513 May 2025
April 20258 April 2025
March 202511 March 2025
February 202511 February 2025
January 202514 January 2025
December 202410 December 2024
November 202412 November 2024
October 20248 October 2024
September 202410 September 2024
August 202413 August 2024
July 20249 July 2024
June 202411 June 2024
May 202414 May 2024
April 20249 April 2024
March 202412 March 2024
February 202413 February 2024
January 20249 January 2024
December 202312 December 2023
November 202314 November 2023
October 202310 October 2023
September 202312 September 2023
August 20238 August 2023
July 202311 July 2023
June 202313 June 2023
May 20239 May 2023
April 202311 April 2023
March 202314 March 2023
February 202314 February 2023
January 202310 January 2023
December 202213 December 2022
November 20228 November 2022
October 202211 October 2022
September 202213 September 2022
August 20229 August 2022
July 202212 July 2022
June 202214 June 2022
May 202210 May 2022
April 202212 April 2022
March 20228 March 2022
February 20228 February 2022
January 202211 January 2022
December 202114 December 2021
November 20219 November 2021
October 202112 October 2021
September 202114 September 2021
August 202110 August 2021
July 202113 July 2021
June 20218 June 2021
May 202111 May 2021
April 202113 April 2021
March 20219 March 2021
February 20219 February 2021
January 202112 January 2021
December 20208 December 2020
November 202010 November 2020
October 202013 October 2020
September 20208 September 2020
August 202011 August 2020
July 202014 July 2020
June 20209 June 2020
May 202012 May 2020
April 202014 April 2020
March 202010 March 2020
February 202011 February 2020
January 202014 January 2020
December 201910 December 2019
November 201912 November 2019
October 20198 October 2019
September 201910 September 2019
August 201913 August 2019
July 20199 July 2019
June 201911 June 2019
May 201914 May 2019
April 20199 April 2019
March 201912 March 2019
February 201912 February 2019
January 20198 January 2019
December 201811 December 2018
November 201813 November 2018
October 20189 October 2018
September 201811 September 2018
August 201814 August 2018
July 201810 July 2018
June 201812 June 2018
May 20188 May 2018
April 201810 April 2018
March 201813 March 2018
January 20189 January 2018
December 201712 December 2017
November 201714 November 2017
October 201710 October 2017
September 201712 September 2017
August 20178 August 2017
July 201711 July 2017
June 201713 June 2017
May 20179 May 2017
April 201711 April 2017
March 201714 March 2017
February 201721 February 2017
January 201710 January 2017
December 201613 December 2016
November 20168 November 2016
October 201611 October 2016
September 201613 September 2016
August 20169 August 2016
July 201612 July 2016
June 201614 June 2016
May 201610 May 2016
April 201612 April 2016
January 201612 January 2016