CVE-2021-42784

CRITICALNVD 9.89.8—

9.8

OS Command Injection vulnerability in debug_fcgi of D-Link DWR-932C E1 firmware allows a remote attacker to perform command injection via a crafted HTTP request.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 88.5%
KEV: Not listed

Published

November 23, 2021

Last Modified

November 21, 2024

References (2)

cve_disclosure@techhttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10246
af854a3a-2127-422b-91ae-364da2661108https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10246

Weakness Classification(1)

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

CWE-78OS Command Injection

Data Freshness Timeline

(refreshed 13× 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.

2026-06-05 22:45 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-42784?

CVE-2021-42784 is a critical vulnerability published on November 23, 2021. OS Command Injection vulnerability in debug_fcgi of D-Link DWR-932C E1 firmware allows a remote attacker to perform command injection via a crafted HTTP request.

When was CVE-2021-42784 disclosed?

CVE-2021-42784 was first published in the National Vulnerability Database on November 23, 2021, 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-2021-42784 actively exploited?

CVE-2021-42784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-42784?

CVE-2021-42784 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-42784?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-42784, 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-2021-42784

CRITICALNVD 9.89.8—

Frequently asked(5)

What is CVE-2021-42784?

When was CVE-2021-42784 disclosed?

Is CVE-2021-42784 actively exploited?

What is the CVSS score of CVE-2021-42784?

CVE-2021-42784 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-42784?

CVE-2021-42784

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-42784?

CVE-2021-42784

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-42784?

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References (2)

Frequently asked(5)

Published

Last Modified

References (2)

Frequently asked(5)

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