CVE-2021-20048
Last modified
CVE-2021-20048 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.. EPSS estimates a 1.94% chance of exploitation in the next 30 days.
Description
A Stack-based buffer overflow in the SonicOS SessionID HTTP response header allows a remote authenticated attacker to cause Denial of Service (DoS) and potentially results in code execution in the firewall. This vulnerability affected SonicOS Gen 5, Gen 6 and Gen 7 firmware versions.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sonicwall | Sonicos | <= 7.0.1-r1456 |
| Sonicwall | Sonicos | <= 7.0.1-5023-1349 |
| Sonicwall | Sonicos | <= 7.0.1-5018-r1715 |
| Sonicwall | Sonicos | <= 6.5.4.8 |
| Sonicwall | Sonicos | <= 6.5.1.13-1n |
| Sonicwall | Sonicos | <= 6.0.5.3-94o |
| Sonicwall | Sonicos | <= 5.9.1.13 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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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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