How severe is CVE-2021-46759?

CVE-2021-46759 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-46759 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46759?

CVE-2021-46759 primarily affects Amd Ryzen 5300g Firmware. In total, 189 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46759?

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

When was CVE-2021-46759 published?

CVE-2021-46759 was published on 2023-05-09 and last updated on 2026-06-17.

CVE-2021-46759

CVE-2021-46759 is a medium-severity vulnerability in Amd Ryzen 5300g Firmware with a CVSS 3.x base score of 6.1. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Amd Ryzen 5300g Firmware
Published: 2023-05-09
Last modified: 2026-06-17

Description

Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physical access and control of a Uapp that runs under the bootloader to reveal the contents of the ASP (AMD Secure Processor) bootloader accessible memory to a serial port, resulting in a potential loss of integrity.

Frequently asked questions

What is CVE-2021-46759?: Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physical access and control of a Uapp that runs under the bootloader to reveal the contents of the ASP (AMD Secure Processor) bootloader accessible memory to a serial port, resulting in a potential loss of integrity.
How severe is CVE-2021-46759?: CVE-2021-46759 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2021-46759 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46759?: CVE-2021-46759 primarily affects Amd Ryzen 5300g Firmware. In total, 189 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46759?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-46759 published?: CVE-2021-46759 was published on 2023-05-09 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001

Affected products (189)

cpe:2.3:o:amd:ryzen_5300g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5300g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5300ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5300ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5500_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5500_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x3d_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x3d_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5945wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5945wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5950x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5950x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5955wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5955wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5965wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5965wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5975wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5975wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*

More vulnerabilities in Amd Ryzen 5300g Firmware

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