Microsoft April 2023 patches address actively exploited flaw
Free public brief. The indicators, the detections with Splunk SPL already written (plus Elastic and KQL where they apply), and a Slack alert the next time this touches a vendor you run are in the app — free account, no card.
Microsoft released patches for multiple vulnerabilities April 12, 2023; CVE-2023-28252 is actively exploited and requires urgent patching.
On April 12, 2023, Microsoft released security patches addressing multiple vulnerabilities in its products. The Japanese Information-technology Promotion Agency (IPA) has flagged these updates as critical, noting that exploitation of these flaws could lead to application crashes or complete system compromise by attackers.
Most significantly, CVE-2023-28252 has been confirmed by Microsoft as actively exploited in the wild. The IPA strongly recommends immediate application of patches for this vulnerability to prevent further compromise. Defenders should prioritize CVE-2023-28252 remediation across their Microsoft estate.
Defenders should apply Microsoft's official patches through Windows Update or other distribution mechanisms without delay, particularly for CVE-2023-28252. Organizations should verify patch deployment across all affected systems and monitor for signs of exploitation.
Mentioned in this report
Source reporting: https://www.ipa.go.jp/archive/security/security-alert/2023/0412-ms.html
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), the actors and CVEs it names as live profiles, and the vendor research on the same campaign — the primary source the news paraphrased, cited and read directly.
It sits in a corpus of 13,854 reports from 146 sources, 616 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Name the vendors you run and Slack hears about the reports that touch them — about forty a week that are yours, not the four hundred that are not.
Create a free account What it costs