{"cve":"CVE-2021-22320","nvd":{"published":"2021-03-22T19:15:11.897","modified":"2026-06-17T03:36:59.743","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":[],"references":["https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-03-dos-en","https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-03-dos-en"],"products":["huawei:ips_module_firmware","huawei:ngfw_module_firmware","huawei:nip6600_firmware","huawei:nip6800_firmware","huawei:secospace_usg6300_firmware","huawei:secospace_usg6500_firmware","huawei:secospace_usg6600_firmware"],"source":"nvd","synced_at":"2026-10-19T21:15:50.279857260+00:00"},"epss":{"cve":"CVE-2021-22320","score":0.00753,"percentile":0.55075,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}