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CVE-2023-40289

31
FAUCET Score

CVE-2023-40289 is a critical command injection vulnerability affecting Supermicro X11SSM-F, X11SAE-F, and X11SSE-F devices running firmware version 1.66. This flaw allows an authenticated attacker with existing BMC administrative privileges to elevate their privileges, potentially leading to full compromise of the affected server. Rated with a CVSS score of 7.2 (HIGH), the vulnerability has a low attack complexity and high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered community attention and media coverage, indicating its significance.

Impacted Technologies

VendorProductVersion(s)CPE
1.66CPE matchmatch criteria
cpe:2.3:o:supermicro:x11ssm-f_firmware:1.66:*:*:*:*:*:*:*
1.66CPE matchmatch criteria
cpe:2.3:o:supermicro:x11sae-f_firmware:1.66:*:*:*:*:*:*:*
1.66CPE matchmatch criteria
cpe:2.3:o:supermicro:x11sse-f_firmware:1.66:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
17.77%
Probability of exploitation in next 30 days
EPSS Percentile
96.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1777 is in the 95th percentile among its peer group of 5,531 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

supermicro.com / en/support/security_BMC_IPMI_Oct_2023
Vendor Advisory
supermicro.com / en/support/security_center
Vendor Advisory