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Microsoft Security Response Center

CVE-2026-21223: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

**What kind of security feature could be bypassed by successfully exploiting this vulnerability?** An authenticated local attacker can disable or enable Windows VBS without administrative privileges, resulting in bypass of platform security hardening. This does not grant direct code execution as another user but weakens system security guarantees, enabling follow‑on attacks.

Microsoft Security Response Center
#vulnerability#windows#microsoft#auth#chrome#Microsoft Edge (Chromium-based)#Security Vulnerability
CVE-2026-20960: Microsoft Power Apps Remote Code Execution Vulnerability

**According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?** Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.

CVE-2026-20931: Windows Telephony Service Elevation of Privilege Vulnerability

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

CVE-2026-20929: Windows HTTP.sys Elevation of Privilege Vulnerability

Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

CVE-2026-20939: Windows File Explorer Information Disclosure Vulnerability

Exposure of sensitive information to an unauthorized actor in Windows File Explorer allows an authorized attacker to disclose information locally.

CVE-2026-20950: Microsoft Excel Remote Code Execution Vulnerability

**According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is a remote code execution?** The word **Remote** in the title refers to the location of the attacker. This type of exploit is sometimes referred to as Arbitrary Code Execution (ACE). The attack itself is carried out locally. This means an attacker or victim needs to execute code from the local machine to exploit the vulnerability.