Is CVE-2023-39666 actively exploited?

No active exploitation of CVE-2023-39666 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-39666 be exploited remotely?

Yes. CVE-2023-39666 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-39666?

CVE-2023-39666 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-39666

CRITICAL

CVE-2023-39666

CWE-120Published: August 18, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

D-Link DIR-842 fw_revA_1-02_eu_multi_20151008 was discovered to contain multiple buffer overflows in the fgets function via the acStack_120 and acStack_220 parameters.

NVD Source

Risk Analysis

Multiple buffer overflow vulnerabilities exist in the D-Link DIR-842 router, which could be leveraged to compromise the device. The critical CVSS score reflects the potential for remote, unauthenticated attackers to gain full control over the system.

No public exploits are currently known, and the vulnerability is not in the KEV database.

Recommended Action

Ensure the device is running the most recent firmware version available from the manufacturer.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-39666 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.