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Microsoft has published Security Update Guide entries for two Microsoft Edge (Chromium-based) remote code execution flaws, CVE-2025-21342 and CVE-2022-21931. Both advisories identify the same impact category—remote code execution in the browser—indicating that successful exploitation could allow malicious code to run in the context of the targeted Edge process.
The disclosures show Microsoft continuing to track and remediate serious browser security issues affecting its Chromium-based Edge platform through formal update guidance. Organizations using Microsoft Edge should review the relevant Security Update Guide entries for affected versions and apply available browser updates promptly, as RCE flaws in web browsers can be triggered through malicious web content and pose a direct risk to enterprise endpoints.
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2 events from the most recent confirmed update back to the earliest known activity.
Microsoft released a Security Update Guide entry for CVE-2025-21342, a remote code execution vulnerability affecting Microsoft Edge (Chromium-based).
Microsoft released a Security Update Guide entry for CVE-2022-21931, a remote code execution vulnerability affecting Microsoft Edge (Chromium-based).
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Microsoft has issued security advisories for a long-running series of **remote code execution** vulnerabilities affecting **Microsoft Edge (Chromium-based)**, with disclosures spanning multiple product update cycles. The referenced flaws include `CVE-2021-43221`, `CVE-2022-21929`, `CVE-2022-33636`, `CVE-2022-38012`, `CVE-2023-21775`, `CVE-2023-36008`, `CVE-2023-36022`, `CVE-2023-36034`, `CVE-2024-38210`, `CVE-2024-38219`, `CVE-2024-43496`, `CVE-2024-43578`, `CVE-2024-43596`, `CVE-2024-49023`, `CVE-2025-21408`, `CVE-2025-25000`, `CVE-2025-29834`, and `CVE-2025-60711`, all tracked by Microsoft as Edge RCE issues. The advisories indicate continued patching of browser-exposed attack surface in Edge, including several clusters of RCE fixes released on the same day, suggesting bundled security updates across versions. While the entries provided do not include technical synopses or exploitation details, the repeated publication of Edge RCE bulletins through Microsoft Update Guide and MSRC portal pages shows sustained remediation activity for code-execution bugs that could be triggered through malicious web content or browser processing components, reinforcing the need for rapid browser update deployment across enterprise fleets.
Jul 8, 2026
Microsoft has published security advisories for a series of **Microsoft Edge (Chromium-based) information disclosure vulnerabilities** affecting the browser across multiple release cycles. The referenced issues include `CVE-2021-36929`, `CVE-2023-33145`, `CVE-2023-36880`, `CVE-2023-38158`, `CVE-2024-21423`, `CVE-2024-29987`, `CVE-2024-30056`, `CVE-2024-38103`, `CVE-2024-38222`, `CVE-2024-49025`, and `CVE-2025-49741`, all listed by Microsoft as information disclosure vulnerabilities in the Chromium-based Edge browser. The advisories provide limited public detail, but the volume and recurrence of these CVEs show an ongoing stream of browser security fixes tied to unintended exposure of sensitive information. For defenders, the immediate takeaway is to ensure **Microsoft Edge is kept fully updated** and to track MSRC guidance for affected versions, as browser-based information disclosure bugs can aid reconnaissance, weaken privacy protections, or support follow-on exploitation when chained with other vulnerabilities.
Jul 8, 2026
Microsoft Edge (Chromium-based) has received fixes for multiple high-severity vulnerabilities, including remote code execution flaws `CVE-2026-58289`, `CVE-2026-58293`, `CVE-2026-58285`, `CVE-2026-58288`, `CVE-2026-57974`, `CVE-2026-58284`, `CVE-2026-58287`, `CVE-2026-57981`, and `CVE-2026-56645`, as well as the security feature bypass issue `CVE-2026-57983`. Public records attribute the issues to Microsoft and rate them from high to critical severity, with CVSS scores reaching **9.0** for `CVE-2026-58289` and several others scoring in the **8.1-8.8** range. Advisories from Microsoft and HKCERT indicate the flaws affect Microsoft Edge and require prompt patching through the browser's latest security updates. While some metadata inconsistently marks the bugs as not remotely exploitable, the listed attack characteristics for several entries include low attack complexity, no privileges required, and in many cases user interaction, making browser update compliance and rapid deployment a priority for enterprise defenders.
Jul 7, 2026