CVE-2021-20034

mediumpriority · attend · 75EPSS 0.818 · 100 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

81.8% (100th) EPSS

CVSS 6.4 · medium

Is it mine?

33 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-25

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

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.4–9.1

v2.06.4mediumAV:N/AC:L/Au:N/C:N/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 4.9

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-269USCWE-284USCWE-284US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-50430SonicWall SMA 10.2.1.0-17sv - Password ResetPoC · exploit_db

affected products (33)

Products and version ranges known to be affected.

SonicWall SMA100≤ 9.0.0.10-28sv and earlierenisa_euvdEU
SonicWall SMA100≤ 10.2.1.0-17sv and earlierenisa_euvdEU
SonicWall SMA100≤ 10.2.0.7-34sv and earlierenisa_euvdEU
SonicWall SMA 200≤ 9.0.0.10-28svfstec_bduRU
SonicWall SMA 20010.2.0.0 → 10.2.0.7-34svfstec_bduRU
SonicWall SMA 20010.2.1.0 → 10.2.1.0-17svfstec_bduRU
SonicWall SMA 210≤ 9.0.0.10-28svfstec_bduRU
SonicWall SMA 21010.2.0.0 → 10.2.0.7-34svfstec_bduRU
SonicWall SMA 21010.2.1.0 → 10.2.1.0-17svfstec_bduRU
SonicWall SMA 400≤ 9.0.0.10-28svfstec_bduRU
SonicWall SMA 40010.2.0.0 → 10.2.0.7-34svfstec_bduRU
SonicWall SMA 40010.2.1.0 → 10.2.1.0-17svfstec_bduRU
SonicWall SMA 410≤ 9.0.0.10-28svfstec_bduRU
SonicWall SMA 41010.2.0.0 → 10.2.0.7-34svfstec_bduRU
SonicWall SMA 41010.2.1.0 → 10.2.1.0-17svfstec_bduRU
SonicWall SMA 500v≤ 9.0.0.10-28svfstec_bduRU
SonicWall SMA 500v10.2.0.0 → 10.2.0.7-34svfstec_bduRU
SonicWall SMA 500v10.2.1.0 → 10.2.1.0-17svfstec_bduRU
sonicwall sma 200 firmware≤ 9.0.0.10-28svnvdUScpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
sonicwall sma 200 firmware10.2.0.0 → 10.2.0.7-34svnvdUScpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*

showing 20 of 33

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-09-27modified 2026-06-17

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+12488 more

references (8)

External citations — patches, advisories, analysis.

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