How severe is CVE-2021-25812?

CVE-2021-25812 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-2021-25812 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-25812?

CVE-2021-25812 affects Chinamobile An Lianbao Wf-1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-25812?

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-2021-25812 published?

CVE-2021-25812 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2021-25812

CVE-2021-25812 is a critical-severity vulnerability in Chinamobile An Lianbao Wf-1 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% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Chinamobile An Lianbao Wf-1 Firmware
Published: 2021-04-29
Last modified: 2026-06-17

Description

Command injection vulnerability in China Mobile An Lianbao WF-1 1.01 via the 'ip' parameter with a POST request to /api/ZRQos/set_online_client.

Frequently asked questions

What is CVE-2021-25812?: Command injection vulnerability in China Mobile An Lianbao WF-1 1.01 via the 'ip' parameter with a POST request to /api/ZRQos/set_online_client.
How severe is CVE-2021-25812?: CVE-2021-25812 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-2021-25812 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-25812?: CVE-2021-25812 affects Chinamobile An Lianbao Wf-1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-25812?: 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-2021-25812 published?: CVE-2021-25812 was published on 2021-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:chinamobile:an_lianbao_wf-1_firmware:1.0.1:*:*:*:*:*:*:*

More vulnerabilities in Chinamobile An Lianbao Wf-1 Firmware

CVE-2021-33963 — Critical (CVSS 9.8): China Mobile An Lianbao WF-1 v1.0.1 router web interface through /api/ZRMacClone/mac_addr_clone receives parameters by…
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CVE-2021-30232 — Critical (CVSS 9.8): The api/ZRIGMP/set_IGMP_PROXY interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute…
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