What’s Vulnerable › Vulnerabilities

CVE-2021-42659

• Severity: medium (CVSS 6.5 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: yes
• Published: 2022-05-24 · updated 2026-06-17
• Weakness: CWE-119

Description

There is a buffer overflow vulnerability in the Web server httpd of the router in Tenda router devices such as Tenda AC9 V1.0 V15.03.02.19(6318) and Tenda AC9 V3.0 V15.03.06.42_multi. When setting the virtual service, the httpd program will crash and exit when the super-long list parameter occurs.

Affected products

• Tenda AC9: 15.03.05.19(6318), 15.03.06.42_multi

References

• https://github.com/Lyc-heng/routers/blob/main/routers/stack4.md
• https://www.cnvd.org.cn/flaw/show/CNVD-2021-24948
• https://github.com/Lyc-heng/routers/blob/main/routers/stack4.md
• https://www.cnvd.org.cn/flaw/show/CNVD-2021-24948

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