CVE-2026-20864
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.6%
45.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-122
Published 2026-01-13 · modified 2026-07-30
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-01-13 — Published (NVD)
- 2026-07-30 — Last modified (NVD)
Description
Heap-based buffer overflow in Connected Devices Platform Service (Cdpsvc) allows an authorized attacker to elevate privileges locally.
Affected
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20864
- https://www.vicarius.io/vsociety/posts/cve-2026-20864-detection-script-heap-based-buffer-overflow-in-windows-connected-devices-platform-service
- https://www.vicarius.io/vsociety/posts/cve-2026-20864-mitigation-script-heap-based-buffer-overflow-in-windows-connected-devices-platform-service