Path Traversal in SonicWall Sma100
CVE-2021-20034
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.810 (99.6th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.810 · newest: 0.810 · change: 0.000
Affected products
- SonicWall Sma100 — versions 9.0.0.10-28sv and earlier, 10.2.0.7-34sv and earlier, 10.2.1.0-17sv and earlier
- SonicWall Sma 200
- SonicWall Sma 200 Firmware
- SonicWall Sma 210
- SonicWall Sma 210 Firmware
- SonicWall Sma 400
- SonicWall Sma 400 Firmware
- SonicWall Sma 410
- SonicWall Sma 410 Firmware
- SonicWall Sma 500v
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021 (Vendor Advisory)
- packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset… (Exploit, VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20034?
- CVE-2021-20034 is a critical-severity vulnerability in SonicWall Sma100, classified under Improper Access Control. CVSS score: 9.1/10. Published 2021-09-27.
- How severe is CVE-2021-20034?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2021-20034 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.