CVE-2021-31326

CRITICALNVD 9.89.8—

9.8

D-Link DIR-816 A2 1.10 B05 allows unauthenticated attackers to arbitrarily reset the device via a crafted tokenid parameter to /goform/form2Reboot.cgi.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 82.4%
KEV: Not listed

Published

March 24, 2022

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/GD008/vuln/blob/main/DIR-816_reset.md
cve@mitrehttps://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10240
cve@mitrehttps://www.dlink.com/en/security-bulletin/
af854a3a-2127-422b-91ae-364da2661108https://github.com/GD008/vuln/blob/main/DIR-816_reset.md
af854a3a-2127-422b-91ae-364da2661108https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10240
af854a3a-2127-422b-91ae-364da2661108https://www.dlink.com/en/security-bulletin/

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 18× 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.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 01:07 UTCEG score recompute
2026-05-26 01:07 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2021-31326?

CVE-2021-31326 is a critical vulnerability published on March 24, 2022. D-Link DIR-816 A2 1.10 B05 allows unauthenticated attackers to arbitrarily reset the device via a crafted tokenid parameter to /goform/form2Reboot.cgi.

When was CVE-2021-31326 disclosed?

CVE-2021-31326 was first published in the National Vulnerability Database on March 24, 2022, 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-2021-31326 actively exploited?

CVE-2021-31326 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31326?

CVE-2021-31326 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-31326?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31326, 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-2021-31326

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-31326?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)