# CVE-2023-20576

## Summary

- **CVE ID:** CVE-2023-20576
- **Severity:** HIGH
- **CVSS Score:** 7.7 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H)
- **CWE:** CWE-345
- **Published:** Sep 2, 2026
- **Last Modified:** Sep 4, 2026

## Description

Insufficient Verification of Data Authenticity in AGESA™ may allow an attacker to update SPI ROM data potentially resulting in denial of service or privilege escalation.

## Affected Products

- AMD — AMD Ryzen™ 3000 Series Desktop Processors (ComboAM4v2 1.2.0.B)
- AMD — AMD Ryzen™ 5000 Series Desktop Processors (ComboAM4v2v 1.2.0.B)
- AMD — AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics (ComboAM4v2 1.2.0.B)
- AMD — AMD Ryzen™ 7000 Series Processors (ComboAM5 1.0.0.7b)
- AMD — AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics (ComboAM4v2 1.2.0.B)
- AMD — AMD Ryzen™ Threadripper™ PRO 5000WX Processors (ChagallWSPI-sWRX8 1.0.0.7)
- AMD — AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics (MendocinoPI-FT6 1.0.0.6)
- AMD — AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics (RembrandtPI-FP7 1.0.0.9b)
- AMD — AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics (RembrandtPI-FP7 1.0.0.9b)
- AMD — AMD Ryzen™ 7040 Series Processors with Radeon™ Graphics (PhoenixPI-FP8-FP7 1.0.0.2)
- AMD — AMD Ryzen™ 7045 Series Mobile Processors (DragonRangeFL1PI 1.0.0.3a)
- AMD — AMD Ryzen™ Embedded 5000 (EmbAM4PI 1.0.0.4)
- AMD — AMD Ryzen™ Embedded V3000 (EmbeddedPI-FP7r2 1.0.0.8)

## References

- [CNA](https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7009.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.13%
- **EPSS Percentile:** 2.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._