CVE-2021-20021
Severity not reported CISA KEVData quality: kev only.
This record comes from the CISA KEV catalog only; NVD details have not been synced yet.
SonicWall Email Security Improper Privilege Management Vulnerability
Vendor / product: SonicWall — SonicWall Email Security
SonicWall Email Security contains an improper privilege management vulnerability that allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20022 and CVE-2021-20023 to achieve privilege escalation.
CVSS
—
Not reported by the source
Timeline (UTC)
Published: not reported
Modified: not reported
NVD status: not reported
Last synced 1 day ago
Verified against the source API 2026-10-27 06:50 UTC
Exploitation
Listed in CISA KEV
Added 2021-11-03 · due 2021-11-17
Known ransomware use: Known
Required action (CISA)
Apply updates per vendor instructions.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- No references reported.
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗