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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00084.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Tenda Subscribe
Ac20 Subscribe
Ac20 Firmware Subscribe

Configuration 1 [-]

AND
cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*
cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*

No data.

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Vendors Products
Tenda Subscribe
Ac20 Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc cve-icon cve-icon
https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow cve-icon cve-icon
https://vuldb.com/?ctiid.338742 cve-icon cve-icon
https://vuldb.com/?id.338742 cve-icon cve-icon
https://vuldb.com/?submit.726360 cve-icon cve-icon
https://www.tenda.com.cn/ cve-icon cve-icon
History

Wed, 31 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Tenda
Tenda ac20
Tenda ac20 Firmware
CPEs cpe:2.3:h:tenda:ac20:-:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*
Vendors & Products Tenda
Tenda ac20
Tenda ac20 Firmware

Tue, 30 Dec 2025 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 30 Dec 2025 20:45:00 +0000

Type Values Removed Values Added
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.
Title Tenda AC20 PowerSaveSet sscanf buffer overflow
Weaknesses CWE-119
CWE-120
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, 'vector': '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'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2025-12-30T21:31:11.375Z

Reserved: 2025-12-30T07:25:12.438Z

Link: CVE-2025-15356

cve-icon Vulnrichment

Updated: 2025-12-30T21:31:08.478Z

cve-icon NVD

Status : Analyzed

Published: 2025-12-30T21:15:43.477

Modified: 2025-12-31T22:09:38.350

Link: CVE-2025-15356

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-05T10:19:41Z

Weaknesses