High 8.8Published Dec 30, 2025

CVE-2025-15356Tenda AC20 PowerSaveSet sscanf buffer overflow

Updated under an hour ago (Oct 27, 2026, 11:30 PM ET)

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It affects Tenda AC20. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Tenda AC20

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Weakness (CWE): CWE-120, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Feb 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Tenda AC20 tenda:ac20_firmware	16.03.08.0; 16.03.08.1; 16.03.08.2; 16.03.08.3; 16.03.08.4; 16.03.08.5; 16.03.08.6; 16.03.08.7; and 5 more ranges	CNA record
tenda ac20_firmware tenda:ac20_firmware	through 16.03.08.12	NVD

References

References

https://vuldb.com/?id.338742	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.338742	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.726360	third-party-advisory, vdb-entry
https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow	broken-link, exploit, third-party-advisory
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc	broken-link, exploit, third-party-advisory
https://www.tenda.com.cn/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.