How severe is CVE-2021-22377?

CVE-2021-22377 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22377?

CVE-2021-22377 primarily affects Huawei S12700 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22377?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22377 published?

CVE-2021-22377 was published on 2021-06-22 and last updated on 2026-06-17.

CVE-2021-22377

CVE-2021-22377 is a high-severity vulnerability in Huawei S12700 Firmware with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Huawei S12700 Firmware
Published: 2021-06-22
Last modified: 2026-06-17

Description

There is a command injection vulnerability in S12700 V200R019C00SPC500, S2700 V200R019C00SPC500, S5700 V200R019C00SPC500, S6700 V200R019C00SPC500 and S7700 V200R019C00SPC500. A module does not verify specific input sufficiently. Attackers can exploit this vulnerability by sending malicious parameters to inject command. This can compromise normal service.

Frequently asked questions

What is CVE-2021-22377?: There is a command injection vulnerability in S12700 V200R019C00SPC500, S2700 V200R019C00SPC500, S5700 V200R019C00SPC500, S6700 V200R019C00SPC500 and S7700 V200R019C00SPC500. A module does not verify specific input sufficiently. Attackers can exploit this vulnerability by sending malicious parameters to inject command. This can compromise normal service.
How severe is CVE-2021-22377?: CVE-2021-22377 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22377?: CVE-2021-22377 primarily affects Huawei S12700 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22377?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22377 published?: CVE-2021-22377 was published on 2021-06-22 and last updated on 2026-06-17.

References

https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210602-01-cmdinj-en

Affected products (5)

cpe:2.3:o:huawei:s12700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s2700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s6700_firmware:v200r019c00spc500:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s7700_firmware:v200r019c00spc500:*:*:*:*:*:*:*

More vulnerabilities in Huawei S12700 Firmware

CVE-2016-4087 — High (CVSS 8.1): Huawei S12700 switches with software before V200R008C00SPC500 and S5700 switches with software before V200R005SPH010,…
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CVE-2016-8786 — High (CVSS 7.5): Huawei S12700 V200R005C00, V200R006C00, V200R007C00, V200R008C00, S5700 V200R006C00, V200R007C00, V200R008C00, S6700…

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