CVE-2021-21737
Published: 24 June 2021
Summary
CVE-2021-21737 is a high-severity Incorrect Default Permissions (CWE-276) vulnerability in Zte Zxv10 B860H V5.0 Firmware. Its CVSS base score is 7.5 (High).
Operationally, ranked at the 41.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-8909
Vulnerability details
A smart STB product of ZTE is impacted by a permission and access control vulnerability. Due to insufficient protection of system application, attackers could use this vulnerability to tamper with the system desktop and affect system customization functions. This affects:…
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ZXV10 B860H V5.0, V83011303.0010, V83011303.0016
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Access control policy can specify and enforce secure default permissions for resources.
Guides setting of default permissions to the minimum required level.
Establishes requirements for appropriate default permissions on system resources as part of configuration management.
Baseline establishment and updates on install/upgrade ensure correct default permissions rather than insecure ones.
Requiring the most restrictive settings instead of defaults prevents incorrect default permissions on resources.
Requires documented processes that include setting and maintaining correct default permissions for configuration items.
Requires addressing secure default permissions in physical and environmental protection controls.
Tailoring explicitly overrides or scopes default permission assignments in the baseline to match the system's actual risk and operational needs.