Xeon Gold 5420
Monthly
Firmware improper input validation in Intel Xeon processors enables a highly privileged local adversary operating within System Management Mode (SMM) or startup code context to alter the integrity of subsequent system components. The CVSS 4.0 vector confirms local-only access (AV:L), high complexity (AC:H), presence-required attack conditions (AT:P), and a high-privilege prerequisite (PR:H), with zero confidentiality or availability impact - only downstream integrity degradation (SI:H). No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, placing real-world exploitation risk firmly in the advanced persistent threat category rather than opportunistic attack.
Firmware improper input validation in Intel Xeon processors enables a highly privileged local adversary operating within System Management Mode (SMM) or startup code context to alter the integrity of subsequent system components. The CVSS 4.0 vector confirms local-only access (AV:L), high complexity (AC:H), presence-required attack conditions (AT:P), and a high-privilege prerequisite (PR:H), with zero confidentiality or availability impact - only downstream integrity degradation (SI:H). No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, placing real-world exploitation risk firmly in the advanced persistent threat category rather than opportunistic attack.