Loading story…
Microsoft disclosed CVE-2025-49738, an Important elevation-of-privilege vulnerability in Microsoft PC Manager that could allow a locally authorized attacker with low privileges to escalate to SYSTEM without user interaction. The issue stems from improper link resolution before file access, tracked as CWE-59, and carries a CVSS 3.1 score of 7.8.
Microsoft said an official fix is available and assessed exploitation as less likely. The company also stated the flaw had not been publicly disclosed and was not known to be exploited at the time of publication. The vulnerability was credited to security researcher Simon (@sim0nsecurity) through coordinated vulnerability disclosure.
Get the actors, campaigns, and ATT&CK mapping behind it.
1 event from the most recent confirmed update back to the earliest known activity.
Microsoft disclosed CVE-2025-49738, an Important elevation of privilege vulnerability in Microsoft PC Manager caused by improper link resolution before file access. The advisory states an official fix is available and that the issue was neither publicly disclosed nor exploited at the time of publication.
Vulnerabilities, threat actors, malware, products, organizations, and breaches Mallory has linked to this story.
Get the adversaries, campaigns, and ATT&CK mapping behind this technique, with detections ready to deploy.
2 references tracked. Mallory keeps watching after this page renders.
msrc.microsoft.com
Open sourcemsrc.microsoft.com
Open sourceMap indicators from this story to your assets and identify affected systems in minutes.
Every observed campaign, victim, and pivot linked to actors named in this story.
Malware, exploits, and IOCs connected to the activity described here.
YARA, Sigma, and Snort rules deployed to your SIEM as soon as they’re published.
Get matching new stories delivered to your team as they break — not the next morning.
Ask questions about this story and take action on the answers.
Other stories Mallory is tracking that overlap on entities, sources, or topic labels.
Microsoft disclosed and patched several Windows elevation-of-privilege vulnerabilities affecting networking-related components, including **Windows Remote Access Connection Manager**, **Windows SMB Server**, and **Network Connection Status Indicator (NCSI)**. The issues tracked as `CVE-2025-62474`, `CVE-2025-62472`, `CVE-2025-47955`, `CVE-2025-59201`, and `CVE-2025-58726` could allow attackers with limited access to gain higher privileges on targeted systems, extending a pattern of privilege-escalation risk previously seen in the same Remote Access Connection Manager component with `CVE-2022-21914`. Among the disclosed flaws, Microsoft provided additional detail for **`CVE-2025-58726`**, describing an **Important** improper access control issue in **Windows SMB Server** that can let an authorized low-privilege attacker elevate to **SYSTEM** over the network by coercing a victim machine to authenticate to an attacker-controlled SMB server using a specially crafted script. Microsoft assigned the bug **CWE-284** and a **CVSS v3.1 score of 7.5**, said exploitation required specific conditions involving an unused or nonexistent Service Principal Name on the target, and stated that the vulnerability was neither publicly disclosed nor exploited in the wild at publication and that a security fix was available.
Jun 29, 2026
Microsoft disclosed and patched multiple **elevation-of-privilege vulnerabilities** in the **Windows Common Log File System (CLFS) Driver**, including `CVE-2026-40407`, `CVE-2025-62470`, and `CVE-2025-32713`. The most detailed advisory, for `CVE-2026-40407`, describes a **heap-based buffer overflow** (`CWE-122`) that allows a locally authenticated low-privilege attacker to escalate to **SYSTEM** without user interaction. Microsoft rated `CVE-2026-40407` as **Important** with a **CVSS 3.1 score of 7.8**, citing **high** impact to confidentiality, integrity, and availability. The company said the flaw had **not** been publicly disclosed and was **not** being exploited in the wild at the time of publication, assessed exploitation as unlikely, and released an official security update to remediate the issue; the related CLFS advisories indicate a continuing pattern of privilege-escalation risk in this Windows component.
Jul 12, 2026
Microsoft published security advisories for several **elevation-of-privilege** vulnerabilities affecting Windows components and related software, including **Microsoft PC Manager** (`CVE-2025-21322`), **Windows Installer** (`CVE-2025-21331`, `CVE-2025-21373`), **Visual Studio** (`CVE-2025-49739`), **.NET** (`CVE-2025-55247`), **Windows Health and Optimized Experiences** (`CVE-2025-59241`), and **Host Process for Windows Tasks** (`CVE-2025-60710`). Microsoft also lists an earlier **Windows Storage** privilege-escalation issue, `CVE-2023-36399`, in its security guidance portal. The advisories provide limited public detail beyond product names and vulnerability class, but the grouping indicates broad exposure across both endpoint and developer environments where successful exploitation could allow an attacker to gain higher privileges on a target system. Organizations using affected Microsoft software should review the corresponding Security Update Guide entries, prioritize patch validation for Windows and developer-tooling assets, and assess whether privilege-escalation paths could be chained with other flaws or post-compromise activity.
Jul 12, 2026