What’s Vulnerable › Vulnerabilities

CVE-2025-12611: Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-11-03 · updated 2026-10-18
• Weakness: CWE-119

Description

A vulnerability was identified in Tenda AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument startIp leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Affected products

• Tenda AC21: 16.03.08.16

References

• https://github.com/LX-LX88/cve/issues/10
• https://vuldb.com/?ctiid.330906
• https://vuldb.com/?id.330906
• https://vuldb.com/?submit.678491
• https://www.tenda.com.cn/

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