How severe is CVE-2021-45401?

CVE-2021-45401 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-2021-45401 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45401?

CVE-2021-45401 affects Tendacn Ac10u Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45401?

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-2021-45401 published?

CVE-2021-45401 was published on 2022-02-18 and last updated on 2026-06-17.

CVE-2021-45401

CVE-2021-45401 is a critical-severity vulnerability in Tendacn Ac10u Firmware 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-77.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Tendacn Ac10u Firmware
Published: 2022-02-18
Last modified: 2026-06-17

Description

A Command injection vulnerability exists in Tenda AC10U AC1200 Smart Dual-band Wireless Router AC10U V1.0 Firmware V15.03.06.49_multi via the setUsbUnload functionality. The vulnerability is caused because the client controlled "deviceName" value is passed directly to the "doSystemCmd" function.

Frequently asked questions

What is CVE-2021-45401?: A Command injection vulnerability exists in Tenda AC10U AC1200 Smart Dual-band Wireless Router AC10U V1.0 Firmware V15.03.06.49_multi via the setUsbUnload functionality. The vulnerability is caused because the client controlled "deviceName" value is passed directly to the "doSystemCmd" function.
How severe is CVE-2021-45401?: CVE-2021-45401 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-2021-45401 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45401?: CVE-2021-45401 affects Tendacn Ac10u Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45401?: 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-2021-45401 published?: CVE-2021-45401 was published on 2022-02-18 and last updated on 2026-06-17.

References

https://github.com/Quadron-Research-Lab/Hardware-IoT/blob/main/Tenda_AC10U_command_injection_RCE.pdf

Affected products (1)

cpe:2.3:o:tendacn:ac10u_firmware:15.03.06.49_multi:*:*:*:*:*:*:*

More vulnerabilities in Tendacn Ac10u Firmware

CVE-2023-44023 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the ssid…
CVE-2023-44022 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the speed_dir…
CVE-2023-44021 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the…
CVE-2023-44020 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the security…
CVE-2023-44019 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the mac…
CVE-2023-44018 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the domain…

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