CVE-2021-20027
Last modified
CVE-2021-20027 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.29% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sonicwall | Sonicos | <= 7.0.1-r1262 |
| Sonicwall | Sonicos | <= 7.0.1-r.1219 |
| Sonicwall | Sonicos | <= 7.0.1-r514 |
| Sonicwall | Sonicos | <= 5.9.1.13 |
| Sonicwall | Sonicos | <= 6.5.1.12 |
| Sonicwall | Sonicos | <= 6.5.4.7 |
| Sonicwall | Sonicos | All versions |
| Sonicwall | Sonicos | <= 6.0.5.3-94o |
References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016Mitigation, Vendor Advisory
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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