CVE-2021-21522

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 86% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Dell BIOS contains a Credentials Management issue. A local authenticated malicious user may potentially exploit this vulnerability to gain access to sensitive information on an NVMe storage by resetting the BIOS password on the system via the Manageability Interface.

CVSS v3
8.2
EG Score
8.2(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

September 28, 2021

Last Modified

November 21, 2024

References (2)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-07-26 14:52 UTCEPSS rescore
  2. 2026-07-25 14:15 UTCEPSS rescore
  3. 2026-07-24 14:15 UTCEPSS rescore
  4. 2026-07-23 14:15 UTCEPSS rescore
  5. 2026-07-23 01:57 UTCEG score recompute
  6. 2026-07-22 22:43 UTCEG score recompute▲ 3.80
  7. 2026-07-22 14:05 UTCEPSS rescore
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  44. 2026-06-11 13:58 UTCEPSS rescore
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  50. 2026-06-07 15:23 UTCEPSS rescore
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  52. 2026-06-06 13:46 UTCEPSS rescore
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  74. 2026-05-26 13:42 UTCEPSS rescore
  75. 2026-05-26 09:50 UTCEG score recompute

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Frequently asked(5)

What is CVE-2021-21522?
CVE-2021-21522 is a high vulnerability published on September 28, 2021. Dell BIOS contains a Credentials Management issue. A local authenticated malicious user may potentially exploit this vulnerability to gain access to sensitive information on an NVMe storage by resetting the BIOS password on the system via the Manageability Interface.
When was CVE-2021-21522 disclosed?
CVE-2021-21522 was first published in the National Vulnerability Database on September 28, 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-2021-21522 actively exploited?
CVE-2021-21522 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.6% of all scored CVEs.
What is the CVSS score of CVE-2021-21522?
CVE-2021-21522 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2021-21522?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21522, 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.

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