February “In the Trend of VM” (#24): vulnerabilities in Microsoft products. A traditional monthly roundup of trending vulnerabilities. This time, compact and all-Microsoft.
🗞 Post on Habr (rus)
🗒 Digest on the PT website (rus)
In total, two vulnerabilities:
🔻 RCE – Microsoft Office (CVE-2026-21509)
🔻 InfDisc – Desktop Window Manager (CVE-2026-20805)
About Information Disclosure – Desktop Window Manager (CVE-2026-20805) vulnerability. Desktop Window Manager is a compositing window manager that has been part of Windows since Windows Vista. Exploitation of the vulnerability, which was addressed in the January Microsoft Patch Tuesday, allows a local attacker to disclose the “section address from a remote ALPC port which is user-mode memory”.
👾 Microsoft noted that this vulnerability is being exploited in attacks. The vulnerability was added to CISA’s KEV catalog on January 13. There are no public details about the attacks yet, but Rapid7 experts suggest that the disclosed memory address can be used to bypass ASLR, “increasing the chance of developing a stable elevation of privilege exploit for DWM”.
🛠 Public exploit PoCs have been available on GitHub since January 14.
Microsoft Patch Tuesday January 2023: ALPC EoP, Win Backup EoP, LocalPotato, Exchange, Remote RCEs. Hello everyone! This episode will be about Microsoft Patch Tuesday for January 2023, including vulnerabilities that were added between December and January Patch Tuesdays.
Alternative video link (for Russia): https://vk.com/video-149273431_456239115
As usual, I use my open source Vulristics project to analyse and prioritize vulnerabilities. I took the comments about the vulnerabilities from the Qualys, Nessus, Rapid7 and ZDI Patch Tuesday reviews.
This is my personal blog. The opinions expressed here are my own and not of my employer. All product names, logos, and brands are property of their respective owners. All company, product and service names used here for identification purposes only. Use of these names, logos, and brands does not imply endorsement. You can freely use materials of this site, but it would be nice if you place a link on https://avleonov.com and send message about it at me@avleonov.com or contact me any other way.