How severe is CVE-2021-21731?

CVE-2021-21731 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2021-21731 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21731?

CVE-2021-21731 affects Zte Zxcloud Irai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21731?

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-2021-21731 published?

CVE-2021-21731 was published on 2021-04-13 and last updated on 2026-06-17.

CVE-2021-21731

CVE-2021-21731 is a high-severity vulnerability in Zte Zxcloud Irai with a CVSS 3.x base score of 8.1. 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 5.8
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Zte Zxcloud Irai
Published: 2021-04-13
Last modified: 2026-06-17

Description

A CSRF vulnerability exists in the management page of a ZTE product.The vulnerability is caused because the management page does not fully verify whether the request comes from a trusted user. The attacker could submit a malicious request to the affected device to delete the data. This affects: ZXCLOUD iRAI All versions up to KVM-ProductV6.03.04

Frequently asked questions

What is CVE-2021-21731?: A CSRF vulnerability exists in the management page of a ZTE product.The vulnerability is caused because the management page does not fully verify whether the request comes from a trusted user. The attacker could submit a malicious request to the affected device to delete the data. This affects: ZXCLOUD iRAI All versions up to KVM-ProductV6.03.04
How severe is CVE-2021-21731?: CVE-2021-21731 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2021-21731 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21731?: CVE-2021-21731 affects Zte Zxcloud Irai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21731?: 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-2021-21731 published?: CVE-2021-21731 was published on 2021-04-13 and last updated on 2026-06-17.

References

https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014824

Affected products (1)

cpe:2.3:a:zte:zxcloud_irai:*:*:*:*:*:*:*:*

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