How severe is CVE-2021-26346?

CVE-2021-26346 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-26346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26346?

CVE-2021-26346 primarily affects Amd Ryzen 3 3100 Firmware. In total, 104 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26346?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26346 published?

CVE-2021-26346 was published on 2023-01-11 and last updated on 2026-06-17.

CVE-2021-26346

CVE-2021-26346 is a medium-severity vulnerability in Amd Ryzen 3 3100 Firmware with a CVSS 3.x base score of 5.5. 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-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Amd Ryzen 3 3100 Firmware
Published: 2023-01-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-26346?: 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.
How severe is CVE-2021-26346?: CVE-2021-26346 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-26346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26346?: CVE-2021-26346 primarily affects Amd Ryzen 3 3100 Firmware. In total, 104 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26346?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26346 published?: CVE-2021-26346 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-1031

Affected products (104)

cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3200g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3200u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3350u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3450u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3580u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3750h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3780u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5125c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5400u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_pro_3200g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_pro_3200ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_pro_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3400g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3450g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3450u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3580u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600xt_firmware:-:*:*:*:*:*:*:*

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CVE-2020-12930 — High (CVSS 7.8): Improper parameters handling in AMD Secure Processor (ASP) drivers may allow a privileged attacker to elevate their…
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CVE-2021-26317 — High (CVSS 7.8): Failure to verify the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resulting in a…

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CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
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