CVE-2026-97631: Pre-boot RCE in EDK II PXE driver
Critical · CVSS 9.5 (CVSS 4.0)EPSS n/aPublished Updated Assigner: TianoCore
Description
EDK2 contains a vulnerability in BIOS where a user may cause “Out-of-bounds Write”, Classic Buffer Overflow, and “Incorrect Calculation of Buffer Size” by remote access. Successful exploitation of this vulnerability can lead to arbitrary code execution. It could also impact Confidentiality, Integrity, and Availability.
CWE-120, CWE-131, CWE-787
Status incidents that name it
- · Minor · names this CVE
“CVE-2026-97631 - critical security vulnerability in the EDK II UEFI firmware component Network filters have already been in place…”
Affected vendors and products
TianoCore: EDK2
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/tianocore/edk2/security/advisories/GHSA-99cj-7hg9-mp4m (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)