CVE-2026-62815
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk57th percentile - higher than 57% of all known CVEs
Summary
A use-after-free vulnerability in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker could exploit the flaw to execute remote code, potentially leading to system takeover.
Recommendation
Install security updates for Microsoft QUIC and monitor network traffic.
Other vulnerabilities in Microsoft QUIC
See all- CVE-2026-105016Critical
Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
- CVE-2026-100219Critical
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
- CVE-2026-85790Medium
A use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
- CVE-2026-103577High
Insecure default variable initialization in Microsoft QUIC allows an unauthorized attacker to bypass a security feature over a network.
- CVE-2026-62898High
Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.
Original NVD description (English source)
Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS