How severe is CVE-2021-30231?

CVE-2021-30231 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-2021-30231 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30231?

CVE-2021-30231 affects Chinamobile An Lianbao Wf-1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30231?

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-2021-30231 published?

CVE-2021-30231 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2021-30231

CVE-2021-30231 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Chinamobile An Lianbao Wf-1 Firmware
Published: 2021-04-29
Last modified: 2026-06-17

Description

The api/zrDm/set_ZRElink interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the bssaddr, abiaddr, devtoken, devid, elinksync, or elink_proc_enable parameter.

Frequently asked questions

What is CVE-2021-30231?: The api/zrDm/set_ZRElink interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute arbitrary commands via shell metacharacters in the bssaddr, abiaddr, devtoken, devid, elinksync, or elink_proc_enable parameter.
How severe is CVE-2021-30231?: CVE-2021-30231 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-2021-30231 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30231?: CVE-2021-30231 affects Chinamobile An Lianbao Wf-1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30231?: 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-2021-30231 published?: CVE-2021-30231 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…
CVE-2021-30234 — Critical (CVSS 9.8): The api/ZRIGMP/set_MLD_PROXY interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute…
CVE-2021-30233 — Critical (CVSS 9.8): The api/ZRIptv/setIptvInfo interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to execute…
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…
CVE-2021-30230 — Critical (CVSS 9.8): The api/ZRFirmware/set_time_zone interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to…
CVE-2021-30228 — Critical (CVSS 9.8): The api/ZRAndlink/set_ZRAndlink interface in China Mobile An Lianbao WF-1 router 1.0.1 allows remote attackers to…

All CVEs affecting Chinamobile An Lianbao Wf-1 Firmware →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-56004 — Critical (CVSS 10.0): A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by…
CVE-2026-56415 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is…
CVE-2026-56413 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability in the ms_service.pl service, which listens…
CVE-2026-49869 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in…
CVE-2026-49261 — Critical (CVSS 10.0): MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through…
CVE-2026-10520 — Critical (CVSS 10.0): An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a…

Browse all CWE-78 (OS Command Injection) vulnerabilities →