Is CVE-2023-39283 actively exploited?

No active exploitation of CVE-2023-39283 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39283 be exploited remotely?

No. CVE-2023-39283 requires local access to exploit.

What is the CVSS score of CVE-2023-39283?

CVE-2023-39283 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2023-39283

HIGH

CVE-2023-39283

CWE-787Published: November 2, 2023· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

An SMM memory corruption vulnerability in the SMM driver (SMRAM write) in CsmInt10HookSmm in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to send arbitrary data to SMM which could lead to privilege escalation.

NVD Source

Technical Analysis

CVE-2023-39283 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.