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CVE-2023-4856

28
FAUCET Score

CVE-2023-4856 is a high-severity format string vulnerability affecting SMM/SMM2 and FPC, allowing an authenticated attacker to execute arbitrary commands on a specific API endpoint. With a CVSS score of 8.8, this vulnerability presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, nor are there publicly available exploit tools like Metasploit or Nuclei modules. The vulnerability has also received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
LenovoSMM, SMM2, FPC
variousCNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.66%
Probability of exploitation in next 30 days
EPSS Percentile
48.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0066 is in the 39th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

support.lenovo.com / us/en/product_security/LEN-140420