CVE-2021-46753

CVE-2021-46753 is a critical-severity vulnerability in Amd Ryzen 6600h Firmware with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Critical (CVSS 3.x base score 9.1)
• EPSS exploit prediction: 1% (43rd percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Amd Ryzen 6600h Firmware
• Published: 2023-05-09
• Last modified: 2026-06-17

Description

Failure to validate the length fields of the ASP (AMD Secure Processor) sensor fusion hub headers may allow an attacker with a malicious Uapp or ABL to map the ASP sensor fusion hub region and overwrite data structures leading to a potential loss of confidentiality and integrity.

Frequently asked questions

What is CVE-2021-46753?

Failure to validate the length fields of the ASP (AMD Secure Processor) sensor fusion hub headers may allow an attacker with a malicious Uapp or ABL to map the ASP sensor fusion hub region and overwrite data structures leading to a potential loss of confidentiality and integrity.

How severe is CVE-2021-46753?

CVE-2021-46753 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2021-46753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46753?

CVE-2021-46753 primarily affects Amd Ryzen 6600h Firmware. In total, 178 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46753?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-46753 published?

CVE-2021-46753 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 (178)

• cpe:2.3:o:amd:ryzen_6600h_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6600hs_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6600u_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6800h_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6800hs_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6800u_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6900hs_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6900hx_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6980hs_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_6980hx_firmware:rembrandtpi-fp7_1.0.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5300g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5300ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5500_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5700g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5700ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5700x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5800_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5800x3d_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5800x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5900_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5900x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5945wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5950x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5955wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5965wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5975wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5995wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3100_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3100_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3100_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3300x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*

More vulnerabilities in Amd Ryzen 6600h Firmware

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