CVE-2026-18448TianoCore EDK2 <= edk2-stable202608
NVD
Vulnerability Summary
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.
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.
CVSS v4.0 Base Metrics — Score 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:NAttack VectorLocal
Attack ComplexityHigh
Attack RequirementsPresent
Privileges RequiredHigh
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)None
Availability (Vulnerable System)None
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Affected & Patched Versions
- TianoCore EDK2 <= edk2-stable202608
- TianoCore EDK2 edk2-stable202608
What to do
Fix it during your normal patch cycle. No exploitation is confirmed yet.
- Check whether you run TianoCore EDK2 <= edk2-stable202608 and which version.
- Update to a patched version listed above, then confirm the new version.
Timeline
- Nov 10, 2026Published
- Nov 10, 2026Record last modified
Score, severity and exploitation changes are tracked from the day Watchtower started logging them.
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Data last checked: Nov 14, 2026 03:32 UTC