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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.
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3 events from the most recent confirmed update back to the earliest known activity.
On 2026-07-06, HKCERT published a security bulletin titled "Microsoft Edge Multiple Vulnerabilities." The reference indicates a coordinated advisory covering multiple Edge flaws.
On 2026-07-03, multiple Microsoft Edge (Chromium-based) vulnerabilities were published, including remote code execution flaws CVE-2026-58293, CVE-2026-58289, 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 security feature bypass flaw CVE-2026-57983. The entries attribute the source to Microsoft and list publication and last-modified dates of July 3, 2026.
On 2026-07-02, Microsoft published a security update for Microsoft Edge Stable Channel addressing vulnerabilities in versions prior to 150.0.4078.48. The Canadian Centre for Cyber Security later advised users and administrators to review Microsoft's release notes and apply the update.
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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 7, 2026
Microsoft has issued security advisories for a series of **Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability** flaws affecting the browser across multiple release cycles. The referenced issues include `CVE-2021-31982`, `CVE-2021-34506`, `CVE-2023-21719`, `CVE-2023-29345`, `CVE-2023-29354`, `CVE-2023-36878`, `CVE-2024-26163`, `CVE-2024-26247`, `CVE-2024-29991`, and `CVE-2025-53791`, all published through Microsoft's Security Update Guide and MSRC portal. The advisories identify a recurring class of weakness in Edge in which built-in browser protections can be bypassed, potentially reducing the effectiveness of security boundaries and defensive controls. While the provided notices do not include technical synopses, the volume and continuity of CVEs show Microsoft repeatedly addressing security-feature-bypass conditions in Edge, underscoring the need for organizations to keep the Chromium-based browser fully updated and to track MSRC guidance for remediation.
Jul 7, 2026
Microsoft Edge users faced a series of serious vulnerabilities spanning remote code execution, information disclosure, and legacy browser compatibility risks. Reported issues included `CVE-2025-59251`, an Edge remote code execution flaw with limited public technical detail; `CVE-2025-29834`, an out-of-bounds read in the V8 JavaScript engine affecting versions before `135.0.2789.91`; and `CVE-2025-49713`, a type confusion bug in V8 that reportedly enabled in-the-wild exploitation against Edge versions before `138.0.3351.65`. Separately, `CVE-2025-49741` was described as an information disclosure issue tied to improper validation of the `x-middleware-subrequest` HTTP header, potentially exposing cached data and session tokens in versions before `137.0.3296.62`. The disclosures also highlighted risk beyond standard browsing sessions. `CVE-2025-30397` affected Microsoft’s Scripting Engine when Edge was used in Internet Explorer Mode, creating an actively exploited path to remote code execution on Windows 10 and Windows 11 systems that still depend on legacy web applications. Microsoft issued updates across the affected products, while defenders were urged to prioritize browser patching, review exposure in Chromium-based deployments, harden JavaScript and web-content controls, and reduce or disable IE Mode where operationally possible. A new advisory from HKCERT on multiple Microsoft Edge vulnerabilities underscores the continuing volume of security issues affecting the browser.
Jun 29, 2026