CVE-2021-22321
There is a use-after-free vulnerability in a Huawei product.
Does this matter?
Lower severity and a low EPSS score (0.74%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.74% probability · 54th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- 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
- Source
- psirt@huawei.com
EPSS 0.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.