CVE-2021-22320

There is a denial of service vulnerability in Huawei products. A module cannot deal with specific messages correctly. Attackers can exploit this vulnerability by sending malicious messages to an affected module. This can lead to denial of service. Affected product include some versions of IPS Module, NGFW Module, NIP6600, NIP6800, Secospace USG6300, Secospace USG6500 and Secospace USG6600.

Published: 2021-03-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22320 is rated Moderate Risk (43.3/100): CVSS High severity, with low exploitation likelihood (EPSS 0.18%). 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-2021-22320

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 2025-03-17 0.09% 0.18% +0.09%
2 2023-03-07 0.89% 0.09% -0.80%
3 2022-04-01 — 0.89% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22320

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-2021-22320

Affected software / configurations for CVE-2021-22320

Vendor Product Version Raw CPE
huawei ips_module_firmware v500r005c00spc100 cpe:2.3:o:huawei:ips_module_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei ips_module_firmware v500r005c00spc200 cpe:2.3:o:huawei:ips_module_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei ips_module_firmware v500r005c20spc300 cpe:2.3:o:huawei:ips_module_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r005c00spc100 cpe:2.3:o:huawei:ngfw_module_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r005c00spc200 cpe:2.3:o:huawei:ngfw_module_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei ngfw_module_firmware v500r005c20spc300 cpe:2.3:o:huawei:ngfw_module_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei nip6600_firmware v500r001c30spc200 cpe:2.3:o:huawei:nip6600_firmware:v500r001c30spc200:*:*:*:*:*:*:*
huawei nip6600_firmware v500r001c30spc600 cpe:2.3:o:huawei:nip6600_firmware:v500r001c30spc600:*:*:*:*:*:*:*
huawei nip6600_firmware v500r001c60spc500 cpe:2.3:o:huawei:nip6600_firmware:v500r001c60spc500:*:*:*:*:*:*:*
huawei nip6600_firmware v500r005c00spc100 cpe:2.3:o:huawei:nip6600_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei nip6600_firmware v500r005c00spc200 cpe:2.3:o:huawei:nip6600_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei nip6600_firmware v500r005c20spc300 cpe:2.3:o:huawei:nip6600_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei nip6600_firmware v500r005c20spc500 cpe:2.3:o:huawei:nip6600_firmware:v500r005c20spc500:*:*:*:*:*:*:*
huawei nip6800_firmware v500r001c60spc500 cpe:2.3:o:huawei:nip6800_firmware:v500r001c60spc500:*:*:*:*:*:*:*
huawei nip6800_firmware v500r005c00spc100 cpe:2.3:o:huawei:nip6800_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei nip6800_firmware v500r005c00spc200 cpe:2.3:o:huawei:nip6800_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei nip6800_firmware v500r005c20spc300 cpe:2.3:o:huawei:nip6800_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei nip6800_firmware v500r005c20spc500 cpe:2.3:o:huawei:nip6800_firmware:v500r005c20spc500:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r001c30spc200 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c30spc200:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r001c30spc600 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c30spc600:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r001c60spc500 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c60spc500:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r005c00spc100 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r005c00spc200 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r005c20spc300 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei secospace_usg6300_firmware v500r005c20spc500 cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r005c20spc500:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r001c30spc200 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c30spc200:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r001c30spc600 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c30spc600:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r001c60spc500 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c60spc500:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r005c00spc100 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r005c00spc200 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r005c20spc300 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei secospace_usg6500_firmware v500r005c20spc500 cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r005c20spc500:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r001c30spc200 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c30spc200:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r001c30spc600 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c30spc600:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r001c60spc500 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c60spc500:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c00spc100 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c00spc100:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c00spc200 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c00spc200:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c20spc300 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c20spc300:*:*:*:*:*:*:*
huawei secospace_usg6600_firmware v500r005c20spc500 cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r005c20spc500:*:*:*:*:*:*:*

References for CVE-2021-22320

cvelogic Threat Intelligence