How severe is CVE-2021-37040?

CVE-2021-37040 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-37040 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37040?

CVE-2021-37040 primarily affects Huawei Harmonyos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37040?

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

When was CVE-2021-37040 published?

CVE-2021-37040 was published on 2021-12-08 and last updated on 2026-06-17.

CVE-2021-37040

CVE-2021-37040 is a critical-severity vulnerability in Huawei Harmonyos with a CVSS 3.x base score of 9.8. 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-88.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-88
Affected product: Huawei Harmonyos
Published: 2021-12-08
Last modified: 2026-06-17

Description

There is a Parameter injection vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may cause privilege escalation of files after CIFS share mounting.

Frequently asked questions

What is CVE-2021-37040?: There is a Parameter injection vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may cause privilege escalation of files after CIFS share mounting.
How severe is CVE-2021-37040?: CVE-2021-37040 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-37040 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37040?: CVE-2021-37040 primarily affects Huawei Harmonyos. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37040?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-37040 published?: CVE-2021-37040 was published on 2021-12-08 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:huawei:harmonyos:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:emui:11.0.0:*:*:*:*:*:*:*
cpe:2.3:o:huawei:magic_ui:4.0.0:*:*:*:*:*:*:*

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