CVE-2021-26347
4.7 · MEDIUMOverview
CVE-2021-26347 is a medium-severity vulnerability affecting amd epyc_7763_firmware. It was published on May 11, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service.
Remediation
Check the references section for vendor advisories and patches from amd. Update epyc_7763_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| amd | epyc_7763_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7713p_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7713_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7663_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7643_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_75f3_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7543p_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7543_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7513_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
| amd | epyc_7453_firmware | >= 0, < milanpi-sp3_1.0.0.7 | Affected |
Frequently Asked Questions
What is CVE-2021-26347?
CVE-2021-26347 is a medium-severity vulnerability affecting amd epyc_7763_firmware. It was published on May 11, 2022 and has a CVSS 3.1 base score of 4.7 (MEDIUM).
How severe is CVE-2021-26347?
This vulnerability has a CVSS 3.1 base score of 4.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-26347?
Check the references section for vendor advisories and patches from amd. Update epyc_7763_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-26347?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-26347 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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