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HIGH · 7.5

CVE-2021-20027

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platf...

Vulnerability Description

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.

CVSS Score

7.5

HIGH

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

Affected Products

VendorProductVersions
SonicwallSonicos<= 7.0.1-r1262
SonicwallNsa 2650-
SonicwallNsa 2700-
SonicwallNsa 3650-
SonicwallNsa 3700-
SonicwallNsa 4650-
SonicwallNsa 4700-
SonicwallNsa 5650-
SonicwallNsa 6650-
SonicwallNsa 6700-
SonicwallNsa 9250-
SonicwallNsa 9450-
SonicwallNsa 9650-
SonicwallTz270-
SonicwallTz270W-
SonicwallTz300-
SonicwallTz300P-
SonicwallTz300W-
SonicwallTz350-
SonicwallTz350W-

Related Weaknesses (CWE)

CWE-120

References

FAQ

What is CVE-2021-20027?

CVE-2021-20027 is a vulnerability with a CVSS score of 7.5 (HIGH). A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platf...

How severe is CVE-2021-20027?

CVE-2021-20027 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-20027?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Sonicos, Sonicwall Nsa 2650, Sonicwall Nsa 2700, Sonicwall Nsa 3650, Sonicwall Nsa 3700.