How severe is CVE-2021-37084?

CVE-2021-37084 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-2021-37084 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37084?

CVE-2021-37084 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37084?

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-2021-37084 published?

CVE-2021-37084 was published on 2021-12-07 and last updated on 2026-06-17.

CVE-2021-37084

CVE-2021-37084 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Huawei Harmonyos
Published: 2021-12-07
Last modified: 2026-06-17

Description

There is a Improper Input Validation vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may lead to malicious invoking other functions of the Smart Assistant through text messages.

Frequently asked questions

What is CVE-2021-37084?: There is a Improper Input Validation vulnerability in Huawei Smartphone.Successful exploitation of this vulnerability may lead to malicious invoking other functions of the Smart Assistant through text messages.
How severe is CVE-2021-37084?: CVE-2021-37084 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-2021-37084 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37084?: CVE-2021-37084 affects Huawei Harmonyos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37084?: 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-2021-37084 published?: CVE-2021-37084 was published on 2021-12-07 and last updated on 2026-06-17.

References

https://device.harmonyos.com/en/docs/security/update/security-bulletins-202109-0000001196270727

Affected products (1)

cpe:2.3:o:huawei:harmonyos:*:*:*:*:*:*:*:*

More vulnerabilities in Huawei Harmonyos

CVE-2023-34157 — Critical (CVSS 10.0): Vulnerability of HwWatchHealth being hijacked.Successful exploitation of this vulnerability may cause repeated pop-up…
CVE-2023-52381 — Critical (CVSS 9.8): Script injection vulnerability in the email module.Successful exploitation of this vulnerability may affect service…
CVE-2023-52378 — Critical (CVSS 9.8): Vulnerability of incorrect service logic in the WindowManagerServices module.Successful exploitation of this…
CVE-2023-52370 — Critical (CVSS 9.8): Stack overflow vulnerability in the network acceleration module.Successful exploitation of this vulnerability may cause…
CVE-2023-52103 — Critical (CVSS 9.8): Buffer overflow vulnerability in the FLP module. Successful exploitation of this vulnerability may cause out-of-bounds…
CVE-2023-46773 — Critical (CVSS 9.8): Permission management vulnerability in the PMS module. Successful exploitation of this vulnerability may cause…

All CVEs affecting Huawei Harmonyos →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →