Is CVE-2023-42789 actively exploited?

No active exploitation of CVE-2023-42789 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-42789 be exploited remotely?

Yes. CVE-2023-42789 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-42789?

CVE-2023-42789 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-42789

CRITICAL

CVE-2023-42789

CWE-787Published: March 12, 2024· Updated: Jul 8, 2026

9.8

CVSS v3.1

Official Description

A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiProxy 7.4.0, FortiProxy 7.2.0 through 7.2.6, FortiProxy 7.0.0 through 7.0.12, FortiProxy 2.0.0 through 2.0.13, FortiSASE 23.2.b allows attacker to execute unauthorized code or commands via specially crafted HTTP requests.

NVD Source

Technical Analysis

CVE-2023-42789 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.

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