A vulnerability in SonicOS where the HTTP server response leaks partial memory by sending a crafted HTTP request, this can potentially lead…

published 2021-06-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7482

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.4%; EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits: 0; none known

A vulnerability in SonicOS where the HTTP server response leaks partial memory by sending a crafted HTTP request, this can potentially lead to an internal sensitive data disclosure vulnerability.

Patch / fix

fixed in 1

sonicwall sonicos 7.0.0.376, 7.0.1-r1036

Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

SonicWall SonicOS

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

psirt.global.sonicwall.com /vuln-detail/SNWLID-2021-0006
vendor-advisory

Sources

CVE List CVE-2021-20019
NVD CVE-2021-20019

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Summary