CVE-2026-58286: Microsoft Edge (Chromium-based) Spoofing Vulnerability
Improper access control in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
CSIRTS triage
- What
- Improper access control allows an unauthorized attacker to perform spoofing over a network.
- Who is affected
- Users of Microsoft Edge (Chromium-based).
- Urgency
- Remediation is urgent due to the high severity rating.
- Action
- Update to the latest version of Microsoft Edge.
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-2026-58286
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-2026-582860.32% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-58286 | coverage & exploitation status | NVD · CVE.org |
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