VulnerabilityAwaiting Analysis

CVE-2026-20753

Integer overflow in the UEFI firmware for the Slim Bootloader may allow an escalation of privilege.

HIGH 8.7EPSS 0.13%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Integer overflow in the UEFI firmware for the Slim Bootloader may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable local code execution. 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 (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (high) impacts.

CVSS 4.0: 8.7 HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.13% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-190
Source: secure@intel.com

References

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01425.html

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.