CVE-2021-20031
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 13.0%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
A Host Header Redirection vulnerability in SonicOS potentially allows a remote attacker to redirect firewall management users to arbitrary web domains.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 13.04% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 13 October 2021
- CISA KEV
- Not listed
- Weakness
- CWE-601
- Affected
- sonicwall/sonicos
- Source
- PSIRT@sonicwall.com
EPSS 13.0% 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/164502/Sonicwall-SonicOS-7.0-Host-Header-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019Vendor Advisory
- http://packetstormsecurity.com/files/164502/Sonicwall-SonicOS-7.0-Host-Header-Injection.htmlExploit, Third Party Advisory, VDB Entry
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0019Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.