What’s Vulnerable › Vulnerabilities

CVE-2021-21724

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-26 · updated 2026-06-17
• Weakness: CWE-401

Description

A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.

Affected products

• ZXR10 8900E: through 3.03.20r2b30p1

References

• http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014584
• http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014584

Get alerted when CVE-2021-21724 or the next vulnerability affects your stack