How severe is CVE-2021-26390?

CVE-2021-26390 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-26390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26390?

CVE-2021-26390 primarily affects Amd Ryzen 5 2600 Firmware. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26390?

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

When was CVE-2021-26390 published?

CVE-2021-26390 was published on 2022-05-10 and last updated on 2026-06-17.

CVE-2021-26390

CVE-2021-26390 is a medium-severity vulnerability in Amd Ryzen 5 2600 Firmware with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
CVSS v2: 4.9
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Amd Ryzen 5 2600 Firmware
Published: 2022-05-10
Last modified: 2026-06-17

Description

A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.

Frequently asked questions

What is CVE-2021-26390?: A malicious or compromised UApp or ABL may coerce the bootloader into corrupting arbitrary memory potentially leading to loss of integrity of data.
How severe is CVE-2021-26390?: CVE-2021-26390 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-26390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26390?: CVE-2021-26390 primarily affects Amd Ryzen 5 2600 Firmware. In total, 37 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26390 published?: CVE-2021-26390 was published on 2022-05-10 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027

Affected products (37)

cpe:2.3:o:amd:ryzen_5_2600_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2600x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2700x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_2700_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_7_3700x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3950x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5950x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700ge_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600g_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600ge_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_threadripper_2990wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_2970wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_2950x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_2920x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_3970x_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_5995wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_5975wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_5965wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_5955wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_threadripper_pro_5945wx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3750h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3700u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3200u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_300u_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Amd Ryzen 5 2600 Firmware

CVE-2023-20559 — High (CVSS 8.8): Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM…
CVE-2023-20558 — High (CVSS 8.8): Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler…
CVE-2021-26316 — High (CVSS 7.8): Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with…
CVE-2021-26384 — High (CVSS 7.8): A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info…
CVE-2021-26386 — High (CVSS 7.8): A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2…
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…

All CVEs affecting Amd Ryzen 5 2600 Firmware →