How severe is CVE-2021-46766?

CVE-2021-46766 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-46766 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46766?

CVE-2021-46766 primarily affects Amd Epyc 9654p Firmware. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46766?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-46766 published?

CVE-2021-46766 was published on 2023-11-14 and last updated on 2026-06-17.

CVE-2021-46766

CVE-2021-46766 is a low-severity vulnerability in Amd Epyc 9654p Firmware with a CVSS 3.x base score of 2.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-459.

Key facts

Severity: Low (CVSS 3.x base score 2.5)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-459
Affected product: Amd Epyc 9654p Firmware
Published: 2023-11-14
Last modified: 2026-06-17

Description

Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.

Frequently asked questions

What is CVE-2021-46766?: Improper clearing of sensitive data in the ASP Bootloader may expose secret keys to a privileged attacker accessing ASP SRAM, potentially leading to a loss of confidentiality.
How severe is CVE-2021-46766?: CVE-2021-46766 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-46766 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46766?: CVE-2021-46766 primarily affects Amd Epyc 9654p Firmware. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46766?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-46766 published?: CVE-2021-46766 was published on 2023-11-14 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:o:amd:epyc_9654p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9654_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9634_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9554p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9554_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9534_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9474f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9454p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9454_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9374f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9354p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9354_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9334_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9274f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9254_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9224_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9174f_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9124_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9684x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9384x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9184x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9754_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9754s_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_9734_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_3995wx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_3975wx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_3955wx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_3945wx_firmware:*:*:*:*:*:*:*:*

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