What’s Vulnerable › Vulnerabilities

CVE-2020-21699

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-22 · updated 2026-06-17
• Weakness: CWE-190

Description

The web server Tengine 2.2.2 developed in the Nginx version from 0.5.6 thru 1.13.2 is vulnerable to an integer overflow vulnerability in the nginx range filter module, resulting in the leakage of potentially sensitive information triggered by specially crafted requests.

Affected products

• Alibaba Tengine: 2.2.2

References

• https://github.com/ZxDecide/Nginx-variants/blob/master/%E9%99%84%E4%BB%B6%28Tengine%29.docx
• https://github.com/ZxDecide/Nginx-variants/blob/master/%E9%99%84%E4%BB%B6%28Tengine%29.docx

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