CVE-2026-18448

CVE Enrichment

CVSS: 5.6 MEDIUM
EPSS: 0.13%
EPSS Percentile: 2.76%
CISA KEV: Not listed

Description

EDK2 contains a vulnerability in BIOS where a privileged attacker may cause “Exposure of Sensitive Information during Transient Execution” by local access. Successful exploitation of this vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 11-Nov-2026 02:21
Last Modified: 13-Nov-2026 04:30
EPSS Date: 2026-11-13

CVSS Vector


            CVSS:4.0                            AV:L /
                            AC:H /
                            AT:P /
                            PR:H /
                            UI:N /
                            VC:H /
                            VI:N /
                            VA:N /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

CNA Products / Version Status

TianoCore · EDK2 Source: CNA · [email protected]
Default status: unaffected

0 ≤ version ≤ edk2-stable202608 — affected (custom)

References

[email protected]

Last enrichment sync: 14-Nov-2026 04:07
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

The EDK II project assigned Skyfall's SMM leak CVE-2026-18448 and rates it 5.6. AMD's EDK II bulletin traces it to missing TSA mitigations in EDK II firmware code. Mior and Skyfall Attacks Can Read Data From AMD SEV-SNP VMs

CVE (2)

Vendors (2)

Products (3)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.