A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration bas…

published 2021-12-23 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7512

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 SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration based on the server responses. This vulnerability impacts 10.2.1.2-24sv, 10.2.0.8-37sv and earlier 10.x versions.

Patch / fix

fixed in 6

sonicwall sma_100_firmware 10.0.0.0
sonicwall sma_200_firmware 10.0.0.0
sonicwall sma_210_firmware 10.0.0.0
sonicwall sma_400_firmware 10.0.0.0
sonicwall sma_410_firmware 10.0.0.0
sonicwall sma_500v_firmware 10.0.0.0

Exploit prediction

1.39% 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 SonicWall SMA100

Classification

Weakness

CWE-204 Observable Response Discrepancy
CWE-203 Observable Discrepancy

References

psirt.global.sonicwall.com /vuln-detail/SNWLID-2021-0030
vendor-advisory

Sources

CVE List CVE-2021-20049
NVD CVE-2021-20049

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Summary