Microsoft Edge Remote Code Execution Vulnerability
CSIRTS triage
- What
- A remote code execution vulnerability exists in Microsoft Edge.
- Who is affected
- Users of Microsoft Edge, specifics not detailed in the advisory.
- Urgency
- Remediation is urgent due to the potential for remote code execution.
- Action
- Apply the latest security updates for Microsoft Edge.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch Microsoft Edge
Get an email when a new Microsoft Edge advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://www.hkcert.org/security-bulletin/microsoft-edge-remote-code-execution-vulnerability_20260629
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-505210.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-50521 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] Microsoft Edge (Chromium-based): Vulnerability allows code executioncert-bund
- highCVE-2026-50521: Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute cod…nvd
- unknownMultiple vulnerabilities in Microsoft Edge (June 29, 2026)cert-fr-avis
- highCVE-2026-50521: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc
Recent advisories for Microsoft Edge Remote
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-70339: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-08-11
- highCVE-2026-72970: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-08-11
- unknownCVE-2026-48561: Microsoft Edge Copilot Remote Code Execution Vulnerabilitymsrc · 2026-07-14
- criticalCVE-2026-58289: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-07-14
- highCVE-2026-58292: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-07-14
- highCVE-2026-58284: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-07-14
More from HKCERT Security Bulletins
- unknownGoogle Chrome Multiple Vulnerabilities2026-08-26
- unknownVeeam Backup & Replication Information Disclosure Vulnerability2026-08-26
- unknownZimbra Multiple Vulnerabilities2026-08-24
- unknownMicrosoft Edge Multiple Vulnerabilities2026-08-24
- unknownGoogle Chrome Multiple Vulnerabilities2026-08-21