High severity · published Oct 12, 2020
CVE-2020-5133
A vulnerability in SonicOS allows a remote unauthenticated attacker to cause Denial of Service due to buffer overflow, which leads to a firewall crash
7.5
CVSS
1.8%
EPSS
No
On KEV
Description
A vulnerability in SonicOS allows a remote unauthenticated attacker to cause Denial of Service due to buffer overflow, which leads to a firewall crash. This vulnerability affected SonicOS Gen 6 version 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SO
Sonicos · Sonicwall
6.0.0.0 through 6.0.5.3; 6.5.0.0 through 6.5.1.11; 7.0.0.0 · source: NVD
SO
Sonicosv · Sonicwall
through 6.5.4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5133
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-5133
Vendor Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2020-0008
More from Sonicos
9.8
CVE-2024-53704
SonicWall SonicOS SSLVPN Improper Authentication Vulnerability
9.8
CVE-2024-40766
SonicWall SonicOS Improper Access Control Vulnerability
9.8
CVE-2020-5135
SonicWall SonicOS Buffer Overflow Vulnerability
9.8
CVE-2025-40600
Use of Externally-Controlled Format String vulnerability in the SonicOS SSL VPN interface allows a remote unauthenticated attacker to cause service disruption
9.8
CVE-2024-40765
An Integer-based buffer overflow vulnerability in the SonicOS via IPSec allows a remote attacker in specific conditions to cause Denial of Service (DoS) and potentially execute…