Microsoft on Tuesday released safety updates to deal with 57 safety vulnerabilities in its software program, together with a whopping six zero-days that it mentioned have been actively exploited within the wild.
Of the 56 flaws, six are rated Essential, 50 are rated Vital, and one is rated Low in severity. Twenty-three of the addressed vulnerabilities are distant code execution bugs and 22 relate to privilege escalation.
The updates are along with 17 vulnerabilities Microsoft addressed in its Chromium-based Edge browser because the launch of last month’s Patch Tuesday update, one in every of which is a spoofing flaw particular to the browser (CVE-2025-26643, CVSS rating: 5.4).
The six vulnerabilities which have come below lively exploitation are listed beneath –
- CVE-2025-24983 (CVSS rating: 7.0) – A Home windows Win32 Kernel Subsystem use-after-free (UAF) vulnerability that enables a licensed attacker to raise privileges domestically
- CVE-2025-24984 (CVSS rating: 4.6) – A Home windows NTFS info disclosure vulnerability that enables an attacker with bodily entry to a goal gadget and the power to plug in a malicious USB drive to probably learn parts of heap reminiscence
- CVE-2025-24985 (CVSS rating: 7.8) – An integer overflow vulnerability in Home windows Quick FAT File System Driver that enables an unauthorized attacker to execute code domestically
- CVE-2025-24991 (CVSS rating: 5.5) – An out-of-bounds learn vulnerability in Home windows NTFS that enables a licensed attacker to reveal info domestically
- CVE-2025-24993 (CVSS rating: 7.8) – A heap-based buffer overflow vulnerability in Home windows NTFS that enables an unauthorized attacker to execute code domestically
- CVE-2025-26633 (CVSS rating: 7.0) – An improper neutralization vulnerability in Microsoft Administration Console that enables an unauthorized attacker to bypass a safety characteristic domestically
ESET, which is credited with discovering and reporting CVE-2025-24983, mentioned it first found the zero-day exploit within the wild in March 2023 and delivered by way of a backdoor named PipeMagic on compromised hosts.
“The vulnerability is a use-after-free in Win32k driver,” the Slovakian firm noted. “In a sure state of affairs achieved utilizing the WaitForInputIdle API, the W32PROCESS construction will get dereferenced another time than it ought to, inflicting UAF. To succeed in the vulnerability, a race situation should be received.”
PipeMagic, first found in 2022, is a plugin-based trojan that has focused entities in Asia and Saudi Arabia, with the malware distributed within the type of a pretend OpenAI ChatGPT utility in late 2024 campaigns.
“Considered one of distinctive options of PipeMagic is that it generates a 16-byte random array to create a named pipe within the format .pipe1.
“This pipe is used for receiving encoded payloads, cease alerts by way of the default native interface. PipeMagic normally works with a number of plugins downloaded from a command-and-control (C2) server, which, on this case, was hosted on Microsoft Azure.”
The Zero Day Initiative famous that CVE-2025-26633 stems from how MSC information are dealt with, permitting an attacker to evade file status protections and execute code within the context of the present consumer. The exercise has been linked to a menace actor tracked as EncryptHub (aka LARVA-208).
Action1 pointed out that menace actors may chain the 4 vulnerabilities affecting core Home windows file system parts to trigger distant code execution (CVE-2025-24985 and CVE-2025-24993) and data disclosure (CVE-2025-24984 and CVE-2025-24991). All of the 4 bugs had been reported anonymously.
“Particularly, the exploit depends on the attacker crafting a malicious VHD file and convincing a consumer to open or mount a VHD file,” Kev Breen, senior director of menace analysis at Immersive, mentioned. “VHDs are Digital Arduous Disks and are sometimes related to storing the working system for digital machines.”
“While they’re extra sometimes related to Digital Machines, we now have seen examples over time the place menace actors use VHD or VHDX information as a part of phishing campaigns to smuggle malware payloads previous AV options. Relying on the configuration of Home windows techniques, merely double-clicking on a VHD file could possibly be sufficient to mount the container and, subsequently, execute any payloads contained throughout the malicious file.”
In accordance with Satnam Narang, senior workers analysis engineer at Tenable, CVE-2025-26633 is the second flaw in MMC to be exploited within the wild as a zero-day after CVE-2024-43572 and CVE-2025-24985 is the primary vulnerability within the Home windows Quick FAT File System Driver since March 2022. It is also the primary to be exploited within the wild as a zero-day.
As is customary, it is presently not recognized the remaining vulnerabilities are being exploited, in what context, and the precise scale of the assaults. The event has prompted the U.S. Cybersecurity and Infrastructure Safety Company (CISA) so as to add them to the Recognized Exploited Vulnerabilities (KEV) catalog, requiring federal companies to use the fixes by April 1, 2025.
Software program Patches from Different Distributors
Along with Microsoft, safety updates have additionally been launched by different distributors over the previous a number of weeks to rectify a number of vulnerabilities, together with —
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