PT-2025-54177 · Tenda · Tenda Ac20

Xuanyu · Published 2025-12-30 · Updated 2026-01-07 · CVE-2025-15356

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Tenda AC20 versions prior to 16.03.08.12

Description A buffer overflow issue exists in Tenda AC20 routers. The issue is located in the sscanf function within the /goform/PowerSaveSet file. Manipulation of the powerSavingEn, time, powerSaveDelay, and ledCloseType arguments can trigger the overflow. This can be exploited remotely. The exploit has been publicly disclosed.

Recommendations Update Tenda AC20 to a version later than 16.03.08.12. As a temporary workaround, restrict access to the /goform/PowerSaveSet file to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

CVE-2025-15356

Affected Products

Tenda Ac20

References · 13

• 🔥 https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc · Exploit
• 🔥 https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow · Exploit
• https://osv.dev/vulnerability/CVE-2025-15356 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-15356 · Security Note
• https://twitter.com/vuldb/status/2005928157984260276 · Twitter Post
• https://vuldb.com/?id.338742 · Note
• https://twitter.com/CVEnew/status/2006132895505690724 · Twitter Post
• https://vuldb.com/?ctiid.338742 · Note
• https://tenda.com.cn · Note
• https://twitter.com/VulmonFeeds/status/2006120705847329221 · Twitter Post
• https://twitter.com/ET_Labs/status/2009018113946472778 · Twitter Post
• https://twitter.com/CveFindCom/status/2006117818098442654 · Twitter Post
• https://vuldb.com/?submit.726360 · Note