microsoft
CISA: Microsoft SharePoint flaw now exploited in ransomware attacks
CISA confirmed today that ransomware gangs have begun abusing a high-severity Microsoft SharePoint remote code execution vulnerability, which has been flagged as actively exploited since early July. Tracked as CVE-2026-45659, this security flaw stems from a deserialization of untrusted data weakness and allows attackers with low privileges to execute arbitrary code on unpatched SharePoint servers. It […]
Windows 11 KB5101684 update released with 42 changes and fixes
Microsoft has released the KB5101684 preview cumulative update for Windows 11 24H2 and 25H2, which 42 bug fixes and additional feature improvements for the operating system. The KB5101684 update is part of the company’s optional non-security preview update schedule, which releases updates at the end of each month to test new fixes and features coming to the next month’s […]
Microsoft blames massive Microsoft 365 outage on maintenance bug
Microsoft says a bug in its automated network maintenance request system caused Thursday’s massive outage by mistakenly removing IP routes from more devices than intended, disrupting Azure and Microsoft 365 services. The outage began at 10:44 AM ET on Thursday, July 23, and mostly affected customers accessing Microsoft 365 services through network infrastructure connected to […]
Microsoft 365 outage affects Teams, SharePoint and other services
Microsoft is impacted by a massive outage affecting Teams and Microsoft 365 services, primarily affecting users in North America. At 11:11 AM ET on July 23, Downdetector recorded 2,403 reports, sharply above its normal baseline of 29. SharePoint accounted for 78% of the complaints, followed by Excel at 11% and the Microsoft 365 Admin Center at 6% […]
Microsoft working to fix Exchange Online mailbox quarantine issue
Microsoft is working to resolve an ongoing Exchange Online issue that has been mistakenly quarantining customers’ mailboxes since Sunday. The incident, tracked by Microsoft under EX1436407, began on July 19 and remained unresolved as of the most recent update Wednesday evening. During this time, affected Exchange Online users have been experiencing issues receiving and sending emails […]
Microsoft to stop Exchange 2016 / 2019 security updates in October
Microsoft has reminded customers that it will stop shipping security updates for Exchange 2016 and 2019 through the Extended Security Update (ESU) program in October. This comes after a 6-month extension announced in April 2026 to the original ESU program, which began in October after Exchange Server 2016 and 2019 reached the end of support. Exchange 2016 reached mainstream support in October […]
Microsoft shares manual fix for WSUS sync delays and timeouts
Microsoft has shared manual mitigations to help IT administrators fix Windows Server Update Services (WSUS) servers affected by a known issue that causes Windows Update scans to fail or time out. This known WSUS sync issue affects both client (Windows 10, version 1607 and later) and server (Windows Server 2012 and later) platforms. On impacted WSUS servers, […]
Windows LegacyHive zero-day flaw gets free, unofficial patches
Free unofficial patches are available for a recently disclosed Windows zero-day flaw that allows attackers to escalate privileges on up-to-date Windows systems. The vulnerability (dubbed LegacyHive and without a CVE ID for easy tracking) was found by a security researcher using the “Nightmare Eclipse” handle in the Windows User Profile Service. Nightmare Eclipse disclosed it the day […]
Microsoft confirms Windows Server Update Services sync delays
Microsoft is working to fix a known issue affecting Windows Server Update Services (WSUS) servers, which has caused synchronization problems for more than a week. WSUS was introduced almost twenty years ago to help IT administrators schedule updates for Microsoft products on enterprise networks from a single local update server, rather than updating each endpoint […]
Windows KB5121767 OOB update fixes shutdowns on some Dell PCs
Microsoft has released emergency updates to fix a known issue causing some Dell PCs to experience performance issues or shut down after installing the July 2026 Windows 11 security updates. As detailed when Microsoft acknowledged the issue on Tuesday, it affects only Dell systems that have installed the KB5101650 cumulative update on Windows 11 25H2 and 24H2 devices. […]