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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 81.8%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 81.83% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 20 October 2021
- CISA KEV
- Not listed
- Weakness
- CWE-284, CWE-22
- Affected
- sonicwall/sma 200 firmware · sonicwall/sma 210 firmware · sonicwall/sma 400 firmware · sonicwall/sma 410 firmware · sonicwall/sma 500v
- Source
- PSIRT@sonicwall.com
EPSS 81.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.htmlExploit, Third Party Advisory, VDB Entry
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021Vendor Advisory
- http://packetstormsecurity.com/files/164564/SonicWall-SMA-10.2.1.0-17sv-Password-Reset.htmlExploit, Third Party Advisory, VDB Entry
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0021Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.