{"id":"CVE-2021-22321","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-22321","generatedAt":"2026-10-27T22:31:10.565Z","title":"There is a use-after-free vulnerability in a Huawei product.","description":"There is a use-after-free vulnerability in a Huawei product. A module cannot deal with specific operations in special scenarios. Attackers can exploit this vulnerability by performing malicious operations. This can cause memory use-after-free, compromising normal service. Affected product include some versions of NIP6300, NIP6600, NIP6800, S1700, S2700, S5700, S6700 , S7700, S9700, Secospace USG6300, Secospace USG6500, Secospace USG6600 and USG9500.","published":"2021-03-22T20:15:18.000Z","lastModified":"2026-06-17T03:37:00.000Z","status":"Modified","sourceIdentifier":"psirt@huawei.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["CWE-416"],"affected":["huawei/nip6300 firmware","huawei/nip6600 firmware","huawei/nip6800 firmware","huawei/s12700 firmware","huawei/s1700 firmware","huawei/s2700 firmware","huawei/s5700 firmware","huawei/s6700 firmware","huawei/s7700 firmware","huawei/s9700 firmware","huawei/secospace usg6300 firmware","huawei/secospace usg6500 firmware","huawei/secospace usg6600 firmware","huawei/usg9500 firmware"],"epss":{"score":0.00741,"percentile":0.54364,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.74%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-01-uaf-en","tags":["Vendor Advisory"],"source":"psirt@huawei.com"},{"url":"https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210210-01-uaf-en","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-22321","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}