CVE-2026-58299: Time-of-check time-of-use (toctou) race condition in Microsoft Edge for Android allows an unauthorized attacker to execute code over a network.

highCVSS 7.5CVE-2026-58299

Time-of-check time-of-use (toctou) race condition in Microsoft Edge for Android allows an unauthorized attacker to execute code over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.5
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-2026-58299

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-2026-582990.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 19% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58299	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 Time-of-check time-of-use

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.

unknownCVE-2026-21046: Time-of-check time-of-use race condition in fabricKeymaster trustlet prior to SMR Jul-2026 Rel…nvd · 2026-07-10
mediumCVE-2026-55950: Time-of-check Time-of-use (TOCTOU) race condition vulnerability in Erlang/OTP ssl (dtls_packet…nvd · 2026-07-02
highCVE-2026-24260: NVIDIA Container Toolkit for Linux contains a vulnerability where an attacker could cause a ti…nvd · 2026-07-01
unknownCVE-2026-12374: Improper certificate validation and a time-of-check time-of-use (TOCTOU) race condition in the…nvd · 2026-07-01
mediumCVE-2026-14160: Time-of-check time-of-use (TOCTOU) race condition vulnerability in Samsung Open Source Escargo…nvd · 2026-06-30
mediumCVE-2026-54370: acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulne…nvd · 2026-06-29