CVE-2021-20048 is a stack-based buffer overflow vulnerability in the SonicOS SessionID HTTP response header, affecting SonicWall Gen 5, Gen 6, and Gen 7 firmware versions. This flaw allows a remote authenticated attacker to trigger a Denial of Service (DoS) and potentially achieve arbitrary code execution on the firewall. With a CVSS score of 8.8 (HIGH), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. Currently, there is no public exploit code available, nor is there evidence of active exploitation, and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 7.0.1-r1456CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
<= 7.0.1-5023-1349CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
<= 7.0.1-5018-r1715CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
<= 6.5.4.8CPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* | ||
<= 6.5.1.13-1nCPE matchmatch criteria | cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.