CVE-2021-21723
7.5 · HIGHOverview
CVE-2021-21723 is a high-severity vulnerability affecting zte zxr10_9904_firmware. It was published on January 26, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Some ZTE products have a DoS vulnerability. Due to the improper handling of memory release in some specific scenarios, a remote attacker can trigger the vulnerability by performing a series of operations, resulting in memory leak, which may eventually lead to device denial of service. This affects: ZXR10 9904, ZXR10 9908, ZXR10 9916, ZXR10 9904-S, ZXR10 9908-S; all versions up to V1.01.10.B12.
Remediation
Check the references section for vendor advisories and patches from zte. Update zxr10_9904_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| zte | zxr10_9904_firmware | 0 | Affected |
| zte | zxr10_9908_firmware | 0 | Affected |
| zte | zxr10_9916_firmware | 0 | Affected |
| zte | zxr10_9904-s_firmware | 0 | Affected |
| zte | zxr10_9908-s_firmware | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-21723?
CVE-2021-21723 is a high-severity vulnerability affecting zte zxr10_9904_firmware. It was published on January 26, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-21723?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21723?
Check the references section for vendor advisories and patches from zte. Update zxr10_9904_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21723?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21723 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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