How severe is CVE-2023-20522?

CVE-2023-20522 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-20522 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-20522?

CVE-2023-20522 primarily affects Amd Milanpi Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-20522?

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

When was CVE-2023-20522 published?

CVE-2023-20522 was published on 2023-01-11 and last updated on 2026-06-17.

CVE-2023-20522

CVE-2023-20522 is a high-severity vulnerability in Amd Milanpi Firmware with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Amd Milanpi Firmware
Published: 2023-01-11
Last modified: 2026-06-17

Description

Insufficient input validation in ASP may allow an attacker with a malicious BIOS to potentially cause a denial of service.

Frequently asked questions

What is CVE-2023-20522?: Insufficient input validation in ASP may allow an attacker with a malicious BIOS to potentially cause a denial of service.
How severe is CVE-2023-20522?: CVE-2023-20522 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-20522 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-20522?: CVE-2023-20522 primarily affects Amd Milanpi Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-20522?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-20522 published?: CVE-2023-20522 was published on 2023-01-11 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032

Affected products (2)

cpe:2.3:o:amd:milanpi_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:romepi_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Amd Milanpi Firmware

CVE-2021-26409 — High (CVSS 7.8): Insufficient bounds checking in SEV-ES may allow an attacker to corrupt Reverse Map table (RMP) memory, potentially…
CVE-2021-46779 — High (CVSS 7.1): Insufficient input validation in SVC_ECC_PRIMITIVE system call in a compromised user application or ABL may allow an…
CVE-2021-46767 — Medium (CVSS 6.1): Insufficient input validation in the ASP may allow an attacker with physical access, unauthorized write access to…
CVE-2021-46791 — Medium (CVSS 5.5): Insufficient input validation during parsing of the System Management Mode (SMM) binary may allow a maliciously crafted…
CVE-2021-46768 — Medium (CVSS 5.5): Insufficient input validation in SEV firmware may allow an attacker to perform out-of-bounds memory reads within the…
CVE-2023-20519 — Low (CVSS 3.3): A Use-After-Free vulnerability in the management of an SNP guest context page may allow a malicious hypervisor to…

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