CVE-2026-18448 | BDVDB-2026-403025 Detail

TianoCoreEDK2

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.

Impact#

Per CVSS v4.0: confidentiality impact high, integrity impact none, availability impact none. Attack vector: local.

Weaknesses#

CWE-1420 Exposure of Sensitive Information during Transient Execution

References#

https://github.com/tianocore/edk2/security/advisories/GHSA-7v86-66vf-h88j

Exploit#

No public exploit known

History#

Version 12026-11-10Record published in the CVE List.

Published

Published: 2026-11-10
Last modified: 2026-11-10

Vendor information

Vendor: TianoCore
Product: EDK2

All TianoCore vulnerabilities

Score

5.6 Medium

EPSS

Not available

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= edk2-stable202608
Fixed
Not stated

Scoring System

CVSS v4.0

5.6 Medium

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

Metric breakdown
Attack Vector	Local
Attack Complexity	High
Attack Requirements	Present
Privileges Required	High
User Interaction	None
Vulnerable System Confidentiality	High
Vulnerable System Integrity	None
Vulnerable System Availability	None
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).