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Fencer Vulns
critical 9.1

CVE-2021-20034 in the critical feed json

An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete…

published 2021-09-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-7497

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
81.8%
EPSS 81.8% chance of exploitation in 30 days, percentile 99.6%
public exploits
1
Exploit-DB

Summary

An improper access control vulnerability in SMA100 allows a remote unauthenticated attacker to bypass the path traversal checks and delete an arbitrary file potentially resulting in a reboot to factory default settings.

Timeline

  1. Published
  2. First public exploit (EDB-50430)

Exploit prediction

81.83% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-50430 SonicWall SMA 10.2.1.0-17sv - Password Reset webapps, 2021-10-20
  • packetstormsecurity.com http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P

Affected products

  • SonicWall SMA100

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.