Arbitrary file upload in Sonicwall Email Security
CVE-2021-20022
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.
Vulnerability class: Unrestricted File Upload
EPSS: 0.326 (97.0th percentile) — read the EPSS interpretation.
Affected products
- Sonicwall Email Security — versions 10.0.9 and earlier
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008 (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2021-20022?
- CVE-2021-20022 is a vulnerability in Sonicwall Email Security, classified under Unrestricted Upload of File with Dangerous Type. Published 2021-04-09.
- Is CVE-2021-20022 known to be exploited?
- Yes. CVE-2021-20022 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.