CVE-2021-26331 7.8 high EPSS 0.3%
High (7.8) in amd. EPSS 0.3% chance of exploitation in the next 30 days.
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution.
Severity
CVSS 3.1 7.8 high CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HEnable JavaScript to see the metric table and diagram.
EPSS 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE CWE-20
Published 2021-11-16
Modified 2026-06-17
Record from the NVD, synced 2026-10-19 Affected amd:epyc_7001_firmware amd:epyc_7002_firmware amd:epyc_7003_firmware amd:epyc_7232p_firmware amd:epyc_7251_firmware amd:epyc_7252_firmware amd:epyc_7262_firmware amd:epyc_7272_firmware amd:epyc_7281_firmware amd:epyc_7282_firmware amd:epyc_72f3_firmware amd:epyc_7301_firmware amd:epyc_7302_firmware amd:epyc_7302p_firmware amd:epyc_7313_firmware amd:epyc_7313p_firmware amd:epyc_7343_firmware amd:epyc_7351_firmware amd:epyc_7351p_firmware amd:epyc_7352_firmware amd:epyc_73f3_firmware amd:epyc_7401_firmware amd:epyc_7401p_firmware amd:epyc_7402_firmware amd:epyc_7402p_firmware amd:epyc_7413_firmware amd:epyc_7443_firmware amd:epyc_7443p_firmware amd:epyc_7451_firmware amd:epyc_7452_firmware amd:epyc_7453_firmware amd:epyc_74f3_firmware amd:epyc_7501_firmware amd:epyc_7502_firmware amd:epyc_7502p_firmware amd:epyc_7513_firmware amd:epyc_7532_firmware amd:epyc_7542_firmware amd:epyc_7543_firmware amd:epyc_7543p_firmware amd:epyc_7551_firmware amd:epyc_7551p_firmware amd:epyc_7552_firmware amd:epyc_75f3_firmware amd:epyc_7601_firmware amd:epyc_7642_firmware amd:epyc_7643_firmware amd:epyc_7662_firmware amd:epyc_7663_firmware amd:epyc_7702_firmware References Check your stack JSON