CVE-2026-58287: Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

highCVSS 8.3CVE-2026-58287

Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.3
Published: 2026-07-03
Last updated: 2026-07-07
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-58287

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-2026-582870.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58287	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 Use after free

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.

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highCVE-2026-15133: Use after free in InterestGroups in Google Chrome prior to 150.0.7871.115 allowed a remote att…nvd · 2026-07-08
highCVE-2026-15129: Use after free in Views in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to …nvd · 2026-07-08
highCVE-2026-15126: Use after free in Forms in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to …nvd · 2026-07-08