What’s Vulnerable › Vulnerabilities

CVE-2025-15356: Tenda AC20 PowerSaveSet sscanf buffer overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-30 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability has been found in Tenda AC20 up to 16.03.08.12. The impacted element is the function sscanf of the file /goform/PowerSaveSet. The manipulation of the argument powerSavingEn/time/powerSaveDelay/ledCloseType leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products

• Tenda AC20: through 16.03.08.12

References

• https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc
• https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow
• https://vuldb.com/?ctiid.338742
• https://vuldb.com/?id.338742
• https://vuldb.com/?submit.726360
• https://www.tenda.com.cn/

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