What is CVE-2021-20016?

CVE-2021-20016 is a critical-severity vulnerability in Sonicwall Sma_100, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-02-04.

How severe is CVE-2021-20016?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-20016 known to be exploited?

Yes. CVE-2021-20016 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.

SQL Injection in Sonicwall Sma_100

CVE-2021-20016

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build v…

Vulnerability class: SQL Injection

EPSS: 0.400 (98.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-89 — SQL Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. 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: 2021-11-17.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

PSIRT@sonicwall.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-20016?: CVE-2021-20016 is a critical-severity vulnerability in Sonicwall Sma_100, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-02-04.
How severe is CVE-2021-20016?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-20016 known to be exploited?: Yes. CVE-2021-20016 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.