Microsoft disclosed CVE-2026-62870, a use-after-free vulnerability in Excel rated CVSS 8.8 that allows remote code execution over a network. The flaw affects multiple supported versions of Microsoft 365 Apps, Excel 2016, Office 2019, and LTSC editions and was published August 3, 2026.
Affected products span multiple versions of Microsoft Office and Excel.
The description states that the use-after-free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Enterprise security teams should prioritize the Office security release referenced in the advisory to close network-attack paths on affected Excel deployments.
Tap a lens to see what this story means for you.
Liked this? The Brief brings you the whole day in tech, verified, every morning.
Two minutes, free forever. What's in The Brief →
See what’s happening right now
The Feed runs all day — short, verified briefs the moment they break.
Open the FeedFollow @thecircuitry_
Every story we publish, as it happens. No noise between.
Reader-supported
The Circuitry is a passion project I've always wanted to build, and I love the work behind it.
Running it costs real money. APIs, hosting, time. To keep improving the site and growing this into something useful for everyone, those costs have to be covered.
Any contribution is appreciated. If not, no pressure. Thanks for reading.
Microsoft Dataverse is affected by critical vulnerability CVE-2026-88131, which allows remote code execution. The flaw scores 9.8 on CVSS; Microsoft says it has already fully mitigated it and customers have nothing to patch.
Microsoft has disclosed CVE-2026-83947, a CVSS 7.7 HIGH spoofing vulnerability in Azure Event Grid caused by missing authorization. Microsoft says it has already fully mitigated the cloud-service flaw and customers have nothing to do.
A critical vulnerability CVE-2026-77900 affects Microsoft Azure App Service for Linux with a CVSS score of 9.8. The flaw allows an unauthenticated attacker to execute code over the network. Microsoft says it has already fully mitigated the flaw; no customer action is needed.
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 contain critical authentication bypass flaw CVE-2026-16823. The NVD rates it 9.1 and warns of remote exploitation without credentials.
Red Hat OpenShift Container Platform 4 is affected by CVE-2026-93017, a high-severity flaw that lets attackers read every secret in every namespace. The 7.7 CVSS score reflects broad access granted through an unrestricted ClusterRole on the insights-operator-gather service account.
