CVE-2026-72970: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
CSIRTS triage
- What
- A heap-based buffer overflow in the Chromium engine allows remote code execution.
- Who is affected
- Microsoft Edge users on any platform running vulnerable versions.
- Urgency
- High; CVSS 8.3 with demonstrated RCE capability warrants urgent patching.
- Action
- Update Microsoft Edge to the latest available version immediately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72970
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-2026-729700.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-72970 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Microsoft Edge
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.
- unknownMicrosoft Edge Multiple Vulnerabilitieshkcert · 2026-08-17
- highCVE-2026-72970: Heap-based buffer overflow in Microsoft Edge (Chromium-based) allows an unauthorized attacker …nvd · 2026-08-14
- medium[NEW] [medium] Microsoft Edge: Vulnerability Enables Code Executioncert-bund · 2026-08-12
- unknownMultiple vulnerabilities in Microsoft Edge (August 12, 2026)cert-fr-avis · 2026-08-12
- mediumCVE-2026-70339: Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-base…nvd · 2026-08-11
- mediumCVE-2026-70339: Microsoft Edge (Chromium-based) Remote Code Execution Vulnerabilitymsrc · 2026-08-11
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