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CRITICAL · 9.8

CVE-2021-20042

An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appli...

Vulnerability Description

An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
SonicwallSma 200 Firmware9.0.0.11-31sv
SonicwallSma 200-
SonicwallSma 210 Firmware9.0.0.11-31sv
SonicwallSma 210-
SonicwallSma 410 Firmware9.0.0.11-31sv
SonicwallSma 410-
SonicwallSma 400 Firmware9.0.0.11-31sv
SonicwallSma 400-
SonicwallSma 500V Firmware9.0.0.11-31sv
SonicwallSma 500V-

Related Weaknesses (CWE)

CWE-441

References

FAQ

What is CVE-2021-20042?

CVE-2021-20042 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An unauthenticated remote attacker can use SMA 100 as an unintended proxy or intermediary undetectable proxy to bypass firewall rules. This vulnerability affected SMA 200, 210, 400, 410 and 500v appli...

How severe is CVE-2021-20042?

CVE-2021-20042 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-20042?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Sma 200 Firmware, Sonicwall Sma 200, Sonicwall Sma 210 Firmware, Sonicwall Sma 210, Sonicwall Sma 410 Firmware.