CVE-2021-20031

mediumpriority · track · 39EPSS 0.130 · 96 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

13.0% (96th) EPSS

CVSS 5.8 · medium

Is it mine?

15 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.

cvss

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

6.1

010

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

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Fsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-601USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-50414Sonicwall SonicOS 7.0 - Host Header InjectionPoC · exploit_db

affected products (15)

Products and version ranges known to be affected.

SonicWall SonicOS≤ 7.0.1-R579 and earlierenisa_euvdEU
SonicWall SonicOS≤ 6.5.4.7 and earlierenisa_euvdEU
SonicWall SonicOS≤ 5.9.1.13 and earlierenisa_euvdEU
SonicWall SonicOS≤ 7.0.1-R1283 and earlierenisa_euvdEU
SonicWall SonicOS≤ 6.5.1.12 and earlierenisa_euvdEU
SonicWall SonicOS≤ 6.0.5.3-94o and earlierenisa_euvdEU
SonicWall SonicOS≤ 6.5.4.4-44V-21-987 and earlierenisa_euvdEU
SonicWall SonicOS≤ 7.0.1-R1262 and earlierenisa_euvdEU
sonicwall sonicos≤ 5.9.1.13nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 6.0.5.3-94onvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 6.5.1.12nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 6.5.4.7nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 7.0.1-r1262nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 7.0.1-r1283nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos≤ 7.0.1-r579nvdUScpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

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 2021-10-12modified 2026-06-17

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references (9)

External citations — patches, advisories, analysis.

scry

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