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CVE-2021-22356

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-11-23 · updated 2026-06-17
• Weakness: CWE-327

Description

There is a weak secure algorithm vulnerability in Huawei products. A weak secure algorithm is used in a module. Attackers can exploit this vulnerability by capturing and analyzing the messages between devices to obtain information. This can lead to information leak.Affected product versions include: IPS Module V500R005C00SPC100, V500R005C00SPC200; NGFW Module V500R005C00SPC100, V500R005C00SPC200; Secospace USG6300 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; Secospace USG6500 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; Secospace USG6600 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200; USG9500 V500R001C30SPC200, V500R001C30SPC600, V500R001C60SPC500, V500R005C00SPC100, V500R005C00SPC200.

Affected products

• Huawei Ips Module Firmware: v500r005c00spc100, v500r005c00spc200
• Huawei Ngfw Module Firmware: v500r005c00spc100, v500r005c00spc200
• Huawei Secospace Usg6300 Firmware: v500r001c30spc200, v500r001c30spc600, v500r001c60spc500, v500r005c00spc100, v500r005c00spc200
• Huawei Secospace Usg6500 Firmware: v500r001c30spc200, v500r001c30spc600, v500r001c60spc500, v500r005c00spc100, v500r005c00spc200
• Huawei Technologies Co., Ltd. Secospace USG6600: v500r001c30spc200, v500r001c30spc600, v500r001c60spc500, v500r005c00spc100, v500r005c00spc200
• Huawei USG9500: v500r001c30spc200, v500r001c30spc600, v500r001c60spc500, v500r005c00spc100, v500r005c00spc200

References

• https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210512-01-infomationleak-en
• https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210512-01-infomationleak-en

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