CVE-2023-40289: A command injection issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices

This week

HIGH 7.2MITIGATEMITIGATEMITIGATE

CVE-2023-40289 is a high-severity flaw (CVSS 7.2) affecting x11ssm-f firmware, x11sae-f firmware, x11sse-f firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A command injection issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices. An attacker can exploit this to elevate privileges from a user with BMC administrative privileges.

Why this priority

High severity
EPSS top 3%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	18.4% (top 3%)
CISA exploited list	No
Weakness	CWE-269
Published	2024-03-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: supermicro

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-03-27 04:15 UTCPublished CVE record published
2026-06-17 06:17 UTCUpdated Record last modified

supermicro x11ssm-f firmware MITIGATE

Affected: 1.66

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.66

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

supermicro x11sae-f firmware MITIGATE

Affected: 1.66

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.66

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

supermicro x11sse-f firmware MITIGATE

Affected: 1.66

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.66

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-40289?

x11ssm-f firmware: mitigate or apply the listed mitigation; x11sae-f firmware: mitigate or apply the listed mitigation; x11sse-f firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-40289 being exploited?

CVE-2023-40289 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-40289 affect?

CVE-2023-40289 affects x11ssm-f firmware, x11sae-f firmware, x11sse-f firmware. Severity is high (CVSS 7.2). A command injection issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices. An attacker can exploit this to elevate privileges from a user with BMC administrative privileges.

How urgent is CVE-2023-40289?

Priority 50/100. High severity; EPSS top 3%: very likely to be exploited

Related CVEs

CVE-2023-40290 HIGH 8.3 MITIGATE MITIGATE An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices
CVE-2023-40288 HIGH 8.3 MITIGATE MITIGATE An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices
CVE-2023-40287 HIGH 8.3 MITIGATE MITIGATE An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices
CVE-2023-40286 HIGH 8.3 MITIGATE MITIGATE An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices
CVE-2023-40285 MEDIUM 6.5 MITIGATE MITIGATE An issue was discovered on Supermicro X11SSM-F, X11SAE-F, and X11SSE-F 1.66 devices

References

← Back to latest CVEs