CVE-2026-20901
Low
No strong exploitation signal.
CVSS base
5.3
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
0.1%
0.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-20
Published 2026-08-11 · modified 2026-08-28
CVSS breakdown
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
| Attack Vector | L | Local |
| Attack Complexity | H | High |
| Privileges Required | H | High |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2026-08-11 — Published (NVD)
- 2026-08-28 — Last modified (NVD)
Description
Improper input validation for some Intel(R) Xeon(R) processors within firmware may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable data alteration. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (high) and availability (none) impacts.