CVE-2021-20031

MEDIUM
MEDIUM Priority: 0.79 BB Relevance: 65/100
Published: 2021-10-12 Modified: 2026-11-09 First seen: 2026-11-09 Status: active

Attack Surface

Network Low Complexity No Auth Scope Change

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Changed
C: Low
I: Low
A: None

Description

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

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
sonicwall sonicos < 7.0.1-r1262

Bug Bounty Relevance

65 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

6.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploitation Probability

12.98%
Raw Score 0.129840
Percentile 96.4%
Date 2026-11-13

EPSS Trend

2026-11-13
0.12984
2026-11-12
0.12984
2026-11-10
0.12984
2026-11-09
0.12984

Intelligence Sources

nvd ref →