How severe is CVE-2023-40286?

CVE-2023-40286 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-40286 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40286?

CVE-2023-40286 primarily affects Supermicro X11ssm-f Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-40286?

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.

Does CVE-2023-40286 have an EU (EUVD) identifier?

Yes. CVE-2023-40286 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44879.

When was CVE-2023-40286 published?

CVE-2023-40286 was published on 2024-03-27 and last updated on 2026-06-17.

CVE-2023-40286

CVE-2023-40286 is a high-severity vulnerability in Supermicro X11ssm-f Firmware with a CVSS 3.x base score of 8.3. 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-79.

Key facts

Severity: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-44879
Weakness: CWE-79
Affected product: Supermicro X11ssm-f Firmware
Published: 2024-03-27
Last modified: 2026-06-17

Description

An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices. An attacker could exploit an XSS issue.

Frequently asked questions

What is CVE-2023-40286?: An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices. An attacker could exploit an XSS issue.
How severe is CVE-2023-40286?: CVE-2023-40286 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-40286 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40286?: CVE-2023-40286 primarily affects Supermicro X11ssm-f Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-40286?: 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.
Does CVE-2023-40286 have an EU (EUVD) identifier?: Yes. CVE-2023-40286 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-44879.
When was CVE-2023-40286 published?: CVE-2023-40286 was published on 2024-03-27 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:supermicro:x11ssm-f_firmware:1.66:*:*:*:*:*:*:*
cpe:2.3:o:supermicro:x11sae-f_firmware:1.66:*:*:*:*:*:*:*
cpe:2.3:o:supermicro:x11sse-f_firmware:1.66:*:*:*:*:*:*:*

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