CVE-2023-39666

CRITICALNVD 9.89.8—

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 68.7%
KEV: Not listed

Published

August 18, 2023

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated Jun 2, 2026

No patch confirmed yet.

generic

Security Bulletin | D-Link

https://www.dlink.com/en/security-bulletin/

generic

D-Link Technical Support

https://support.dlink.com/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-39666?

CVE-2023-39666 is a critical vulnerability published on August 18, 2023. D-Link DIR-842 fwrevA1-02eumulti20151008 was discovered to contain multiple buffer overflows in the fgets function via the acStack120 and acStack_220 parameters.

When was CVE-2023-39666 disclosed?

CVE-2023-39666 was first published in the National Vulnerability Database on August 18, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-39666 actively exploited?

CVE-2023-39666 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 68.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2023-39666 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2023-39666?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-39666, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-39666

📅 Published

🔄 Last Modified

📋 Advisory Details (2)