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Vulnerability record · CVE-2021-22357 · published 23 August 2021

CVE-2021-22357: Huawei s12700 firmware improper input validation vulnerability

Huawei · S12700 Firmware

There is a denial of service vulnerability in Huawei products. A module cannot deal with specific messages due to validating inputs insufficiently. Attackers can exploit this vulnerability by sending specific messages to affected module. This can cause denial of service. Affected product versions include: S12700 V200R013C00SPC500, V200R019C00SPC500; S5700 V200R013C00SPC500, V200R019C00SPC500; S6700 V200R013C00SPC500, V200R019C00SPC500; S7700 V200R013C00SPC500, V200R019C00SPC500.

7.5 CVSS 3.1 High EPSS 0.70% · top 48.0% CWE-20 · Improper input validation
7.5CVSS 3.1 base score, v2 5.0
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

There is a denial of service vulnerability in Huawei products. A module cannot deal with specific messages due to validating inputs insufficiently. Attackers can exploit this vulnerability by sending specific messages to affected module. This can cause denial of service. Affected product versions include: S12700 V200R013C00SPC500, V200R019C00SPC500; S5700 V200R013C00SPC500, V200R019C00SPC500; S6700 V200R013C00SPC500, V200R019C00SPC500; S7700 V200R013C00SPC500, V200R019C00SPC500.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210512-01-dos-en Vendor Advisory
https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210512-01-dos-en Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.6CVE-2019-5254Huawei ap2000 firmware out-of-bounds read vulnerabilityCertain Huawei products (AP2000;IPS Module;NGFW Module;NIP6300;NIP6600;NIP6800;S5700;SVN5600;SVN5800;SVN5800-C;SeMG9811;Secospace AntiDDoS8000;Secosp…EPSS 0.75%8.1CVE-2016-4087Huawei s12700 firmware improper input validation vulnerabilityHuawei S12700 switches with software before V200R008C00SPC500 and S5700 switches with software before V200R005SPH010, when the debug switch is enable…EPSS 1.5%7.5CVE-2021-37129Huawei ips module firmware out-of-bounds write vulnerabilityThere is an out of bounds write vulnerability in some Huawei products. The vulnerability is caused by a function of a module that does not properly v…EPSS 0.68%7.5CVE-2021-22359Huawei s5700 firmware improper input validation vulnerabilityThere is a denial of service vulnerability in the verisions V200R005C00SPC500 of S5700 and V200R005C00SPC500 of S6700. An attacker could exploit this…EPSS 0.71%7.5CVE-2019-5304Huawei ar120-s firmware classic buffer overflow vulnerabilitySome Huawei products have a buffer error vulnerability. An unauthenticated, remote attacker could send specific MPLS Echo Request messages to the tar…EPSS 0.97%7.5CVE-2019-19397Huawei s12700 firmware vulnerabilityThere is a weak algorithm vulnerability in some Huawei products. The affected products use weak algorithms by default. Attackers may exploit the vuln…EPSS 0.76%7.5CVE-2019-5285Huawei s12700 firmware improper input validation vulnerabilitySome Huawei S series switches have a DoS vulnerability. An unauthenticated remote attacker can send crafted packets to the affected device to exploit…EPSS 1.7%7.5CVE-2016-8786Huawei s12700 firmware improper input validation vulnerabilityHuawei S12700 V200R005C00, V200R006C00, V200R007C00, V200R008C00, S5700 V200R006C00, V200R007C00, V200R008C00, S6700 V200R008C00, S7700 V200R001C00, …EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2021-22357), CISA KEV, FIRST EPSS (scores of 2026-10-15). This page is refreshed as NVD updates the record.