How severe is CVE-2021-44827?

CVE-2021-44827 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44827?

CVE-2021-44827 affects Tp-link Archer C20i Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44827?

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-2021-44827 published?

CVE-2021-44827 was published on 2022-03-04 and last updated on 2026-06-17.

CVE-2021-44827

CVE-2021-44827 is a high-severity vulnerability in Tp-link Archer C20i Firmware with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 54% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 54% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Tp-link Archer C20i Firmware
Published: 2022-03-04
Last modified: 2026-06-17

Description

There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.

Frequently asked questions

What is CVE-2021-44827?: There is remote authenticated OS command injection on TP-Link Archer C20i 0.9.1 3.2 v003a.0 Build 170221 Rel.55462n devices vie the X_TP_ExternalIPv6Address HTTP parameter, allowing a remote attacker to run arbitrary commands on the router with root privileges.
How severe is CVE-2021-44827?: CVE-2021-44827 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 54% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44827?: CVE-2021-44827 affects Tp-link Archer C20i Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44827?: 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-2021-44827 published?: CVE-2021-44827 was published on 2022-03-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:archer_c20i_firmware:*:*:*:*:*:*:*:*

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