SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.
Published 2021-04-09 18:15:13
Updated 2025-02-06 20:15:36
View at NVD,   CVE.org

Products affected by CVE-2021-20022

CVE-2021-20022 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
SonicWall Email Security Unrestricted Upload of File Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
SonicWall Email Security contains an unrestricted upload of file with dangerous type vulnerability that allows a post-authenticated attacker to upload a file to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-2002
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-20022
Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-20022

0.33%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20022

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.5
MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P
8.0
6.4
NIST
7.2
HIGH CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
1.2
5.9
134c704f-9b21-4f2e-91b3-4a467353bcc0 2025-02-06
7.2
HIGH CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
1.2
5.9
NIST

CWE ids for CVE-2021-20022

  • The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
    Assigned by:
    • 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Primary)
    • nvd@nist.gov (Secondary)
    • PSIRT@sonicwall.com (Primary)

References for CVE-2021-20022

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