CVE-2022-22278

A vulnerability in SonicOS CFS (Content filtering service) returns a large 403 forbidden HTTP response message to the source address when users try to access prohibited resource this allows an attacker to cause HTTP Denial of Service (DoS) attack

Published: 2022-04-27 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-22278 is rated Moderate Risk (49.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.86%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-22278

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.26% 0.86% +0.60%
2 2025-04-30 0.36% 0.26% -0.10%
3 2025-04-28 — 0.36% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-22278

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2022-22278

Affected software / configurations for CVE-2022-22278

Vendor Product Version Raw CPE
sonicwall tz300p_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz300p_firmware:*:*:*:*:*:*:*:*
sonicwall tz300w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz300w_firmware:*:*:*:*:*:*:*:*
sonicwall tz350_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz350_firmware:*:*:*:*:*:*:*:*
sonicwall tz350w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz350w_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_10700_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_10700_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_11700_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_11700_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_12400_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_12400_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_12800_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_12800_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_13700_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_13700_firmware:*:*:*:*:*:*:*:*
sonicwall nssp_15700_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nssp_15700_firmware:*:*:*:*:*:*:*:*
sonicwall tz370_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz370_firmware:*:*:*:*:*:*:*:*
sonicwall tz370w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz370w_firmware:*:*:*:*:*:*:*:*
sonicwall tz400_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz400_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_10_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_10_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_100_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_100_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_1600_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_1600_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_200_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_200_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_25_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_25_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_270_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_270_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_300_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_300_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_400_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_400_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_470_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_470_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_50_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_50_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_800_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_800_firmware:*:*:*:*:*:*:*:*
sonicwall nsv_870_firmware < 7.0.1.0 cpe:2.3:o:sonicwall:nsv_870_firmware:*:*:*:*:*:*:*:*
sonicwall tz400w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz400w_firmware:*:*:*:*:*:*:*:*
sonicwall tz470_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz470_firmware:*:*:*:*:*:*:*:*
sonicwall tz470w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz470w_firmware:*:*:*:*:*:*:*:*
sonicwall tz500_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz500_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_2650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_2650_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_2700_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_2700_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_3650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_3650_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_3700_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_3700_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_4650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_4650_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_4700_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_4700_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_5650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_5650_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_5700_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_5700_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_6650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_6650_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_6700_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_6700_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_9250_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_9250_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_9450_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_9450_firmware:*:*:*:*:*:*:*:*
sonicwall nsa_9650_firmware < 7.0.1 cpe:2.3:o:sonicwall:nsa_9650_firmware:*:*:*:*:*:*:*:*
sonicwall tz500w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz500w_firmware:*:*:*:*:*:*:*:*
sonicwall tz570_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz570_firmware:*:*:*:*:*:*:*:*
sonicwall tz570p_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz570p_firmware:*:*:*:*:*:*:*:*
sonicwall tz570w_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz570w_firmware:*:*:*:*:*:*:*:*
sonicwall tz600_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz600_firmware:*:*:*:*:*:*:*:*
sonicwall tz600p_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz600p_firmware:*:*:*:*:*:*:*:*
sonicwall tz670_firmware < 7.0.1 cpe:2.3:o:sonicwall:tz670_firmware:*:*:*:*:*:*:*:*

References for CVE-2022-22278

cvelogic Threat Intelligence