KEV Entry

CVE-2021-20021

Known Exploited Vulnerability Entry KEVIntel

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Entry Details
Confirmed Exploited

CVE-2021-20021

2021-11-03 00:00 UTC

Timestamps

2021-11-03

2021-11-03

Scope

KEVIntel entry: A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP... | Affected: SonicWall / Email Security | CVSS: 9.8 (CRITICAL) | Used in malware: yes | Not yet in CISA KEV: False

References
  • {'id': 'CVE-2021-20021', 'url': 'https://www.cve.org/CVERecord?id=CVE-2021-20021'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/CVE-2021-20021'}

f508bf72-9ba9-48d1-aa26-f765b74e5587

KEVIntel
caeb2787-0d58-4236-9039-7c86c3e566f3

2026-06-23 14:04 UTC

2026-07-10 06:14 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel confirmed_compromise 0.70
View details 
{
  "added_date": "2021-11-03T00:00:00.000Z",
  "ahead_of_cisa_kev": null,
  "cvss_score": 9.8,
  "cvss_severity": "CRITICAL",
  "epss_percentile": null,
  "epss_score": null,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": false,
  "product": "Email Security",
  "title": "A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP...",
  "used_in_malware": "yes",
  "vendor": "SonicWall"
}
 -
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