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.

Published: 2023-05-09 Last update: 2025-01-27 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-46759 is rated Low Risk (31.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.28%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-46759

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 0.28% +0.14%
2 2026-05-31 0.15% 0.15% -0.00%
3 2026-05-24 — 0.15% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-46759

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 0.9 5.2 [email protected]
6.1 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 0.9 5.2 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2021-46759

Affected software / configurations for CVE-2021-46759

Vendor Product Version Raw CPE
amd ryzen_5300g_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5300g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5300g_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5300g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5300ge_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5300ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5300ge_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5300ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5500_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5500_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5500_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5500_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5600_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5600_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5600_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5600_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5600g_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5600g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5600g_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5600g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5600ge_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5600ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5600ge_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5600ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5600x_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5600x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5600x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5600x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5700g_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5700g_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5700g_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5700g_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5700ge_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5700ge_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5700ge_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5700ge_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5700x_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5700x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5700x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5700x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5800_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5800_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5800_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5800_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5800x3d_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5800x3d_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5800x3d_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5800x3d_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5800x_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5800x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5800x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5800x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5900_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5900_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5900_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5900_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5900x_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5900x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5900x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5900x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5945wx_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5945wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5945wx_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5945wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5950x_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5950x_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5950x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5950x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5955wx_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5955wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5955wx_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5955wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5965wx_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5965wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5965wx_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5965wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5975wx_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5975wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5975wx_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5975wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_5995wx_firmware cezannepi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_5995wx_firmware:cezannepi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_5995wx_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_5995wx_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3100_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3100_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3100_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3100_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3100_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3100_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3100_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3100_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3300x_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3300x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3300x_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3300x_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3300x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3300x_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3300x_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3500_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3500_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3500_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3500_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3500_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3500_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3500_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3500_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3500_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3500_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3500x_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3500x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3500x_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3500x_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3500x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3500x_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3500x_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3600_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3600_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3600_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3600_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3600_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3600_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3600_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3600_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3600_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3600_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3600x_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3600x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3600x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3600x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3600x_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3600x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3600x_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3600x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3600x_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3600x_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3600xt_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3600xt_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3600xt_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3600xt_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3600xt_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3600xt_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
amd ryzen_3600xt_firmware picassopi-fp5_1.0.0.e cpe:2.3:o:amd:ryzen_3600xt_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
amd ryzen_3600xt_firmware renoirpi-fp6_1.0.0.8 cpe:2.3:o:amd:ryzen_3600xt_firmware:renoirpi-fp6_1.0.0.8:*:*:*:*:*:*:*
amd ryzen_3800x_firmware comboam4pi_1.0.0.9 cpe:2.3:o:amd:ryzen_3800x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
amd ryzen_3800x_firmware comboam4v2_pi_1.2.0.5 cpe:2.3:o:amd:ryzen_3800x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
amd ryzen_3800x_firmware comboam4v2_pi_1.2.0.8 cpe:2.3:o:amd:ryzen_3800x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*

References for CVE-2021-46759

cvelogic Threat Intelligence