A relative path traversal vulnerability in the SMA100 upload funtion allows a remote unauthenticated attacker to upload crafted web pages o…

published 2021-12-08 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7503

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 25.1%; EPSS 25.1% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

A relative path traversal vulnerability in the SMA100 upload funtion allows a remote unauthenticated attacker to upload crafted web pages or files as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

Exploit prediction

25.15% chance of exploitation in the next 30 days, higher than 97% 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:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

SonicWall SonicWall SMA100

Classification

Weakness

CWE-23 Relative Path Traversal
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

psirt.global.sonicwall.com /vuln-detail/SNWLID-2021-0026
vendor-advisory

Sources

CVE List CVE-2021-20040
NVD CVE-2021-20040

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Summary