CVE-2021-20039

highpriority · attend · 73EPSS 0.787 · 100 %ileexploit · weaponizedEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · weaponized

Likely / severe?

78.7% (100th) EPSS

CVSS 9 · high

Is it mine?

19 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-26

Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to inject arbitrary commands as a 'nobody' user. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances.

cvss

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

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-78USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

exploit/linux/http/sonicwall_cve_2021_20039SonicWall SMA 100 Series Authenticated Command Injectionweaponized · metasploit

affected products (19)

Products and version ranges known to be affected.

SonicWall SonicWall SMA100≤ 10.2.0.8-37sv and earlierenisa_euvdEU
SonicWall SonicWall SMA100≤ 10.2.1.2-24sv and earlierenisa_euvdEU
SonicWall SonicWall SMA100≤ 10.2.1.1-19sv and earlierenisa_euvdEU
SonicWall SonicWall SMA100≤ 9.0.0.11-31sv and earlierenisa_euvdEU
sonicwall sma 200 firmware= 10.2.0.8-37svnvdUScpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
sonicwall sma 200 firmware= 10.2.1.1-19svnvdUScpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
sonicwall sma 200 firmware= 9.0.0.11-31svnvdUScpe:2.3:o:sonicwall:sma_200_firmware:*:*:*:*:*:*:*:*
sonicwall sma 210 firmware= 10.2.0.8-37svnvdUScpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
sonicwall sma 210 firmware= 10.2.1.1-19svnvdUScpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
sonicwall sma 210 firmware= 9.0.0.11-31svnvdUScpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
sonicwall sma 400 firmware= 10.2.0.8-37svnvdUScpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
sonicwall sma 400 firmware= 10.2.1.1-19svnvdUScpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
sonicwall sma 400 firmware= 9.0.0.11-31svnvdUScpe:2.3:o:sonicwall:sma_400_firmware:*:*:*:*:*:*:*:*
sonicwall sma 410 firmware= 10.2.0.8-37svnvdUScpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
sonicwall sma 410 firmware= 10.2.1.1-19svnvdUScpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
sonicwall sma 410 firmware= 9.0.0.11-31svnvdUScpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
sonicwall sma 500v firmware= 10.2.0.8-37svnvdUScpe:2.3:o:sonicwall:sma_500v_firmware:*:*:*:*:*:*:*:*
sonicwall sma 500v firmware= 10.2.1.1-19svnvdUScpe:2.3:o:sonicwall:sma_500v_firmware:*:*:*:*:*:*:*:*
sonicwall sma 500v firmware= 9.0.0.11-31svnvdUScpe:2.3:o:sonicwall:sma_500v_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-12-08modified 2026-06-17

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references (9)

External citations — patches, advisories, analysis.

scry

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