CVE-2026-21248

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

CVSS v3.1

7.3 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS

1.24% chance of exploitation in the next 30 days, 67th percentile

Published

2026-02-10

Updated

2026-08-19

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/52537

References

• CVE Record
• NVD entry

Related

• CVE-2026-21244
• CVE-2026-21250
• CVE-2026-2122
• CVE-2026-2129
• CVE-2026-2120
• CVE-2026-2131