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ID

VAR-202511-2366


CVE

CVE-2025-65221


TITLE

Tenda AC21 setPptpUserList buffer overflow vulnerability

Trust: 0.6

sources: CNVD: CNVD-2025-29422

DESCRIPTION

Tenda AC21 V16.03.08.16 is vulnerable to Buffer Overflow via the list parameter of /goform/setPptpUserList. The Tenda AC21 is a dual-band gigabit wireless router from Tenda Technology, designed for high-speed home internet needs. It supports 802.11ac wave2 technology, with a dual-band concurrent speed of up to 2033Mbps, including 1733Mbps on the 5GHz band, meeting the demands of high-bandwidth applications such as 4K video and live streaming. This vulnerability stems from the fact that the `list` parameter in `/goform/setPptpUserList` fails to properly validate the length of the input data. Attackers can exploit this vulnerability to cause a denial-of-service attack

Trust: 1.44

sources: NVD: CVE-2025-65221 // CNVD: CNVD-2025-29422

IOT TAXONOMY

category:['Network device']sub_category: -

Trust: 0.6

sources: CNVD: CNVD-2025-29422

AFFECTED PRODUCTS

vendor:tendamodel:ac21scope:eqversion:16.03.08.16

Trust: 1.0

vendor:tendamodel:ac21scope:eqversion:v16.03.08.16

Trust: 0.6

sources: CNVD: CNVD-2025-29422 // NVD: CVE-2025-65221

CVSS

SEVERITY

CVSSV2

CVSSV3

134c704f-9b21-4f2e-91b3-4a467353bcc0: CVE-2025-65221
value: MEDIUM

Trust: 1.0

CNVD: CNVD-2025-29422
value: LOW

Trust: 0.6

CNVD: CNVD-2025-29422
severity: LOW
baseScore: 3.3
vectorString: AV:A/AC:L/AU:N/C:N/I:N/A:P
accessVector: ADJACENT_NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 6.5
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.6

134c704f-9b21-4f2e-91b3-4a467353bcc0: CVE-2025-65221
baseSeverity: MEDIUM
baseScore: 4.3
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
attackVector: ADJACENT
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: LOW
exploitabilityScore: 2.8
impactScore: 1.4
version: 3.1

Trust: 1.0

sources: CNVD: CNVD-2025-29422 // NVD: CVE-2025-65221

PROBLEMTYPE DATA

problemtype:CWE-121

Trust: 1.0

sources: NVD: CVE-2025-65221

EXTERNAL IDS

db:NVDid:CVE-2025-65221

Trust: 1.6

db:CNVDid:CNVD-2025-29422

Trust: 0.6

sources: CNVD: CNVD-2025-29422 // NVD: CVE-2025-65221

REFERENCES

url:https://github.com/madgeaaaaa/my_vuln_2/blob/main/tenda/vuln2.md

Trust: 1.6

sources: CNVD: CNVD-2025-29422 // NVD: CVE-2025-65221

SOURCES

db:CNVDid:CNVD-2025-29422
db:NVDid:CVE-2025-65221

LAST UPDATE DATE

2025-11-28T23:30:05.658000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2025-29422date:2025-11-27T00:00:00
db:NVDid:CVE-2025-65221date:2025-11-21T17:25:39.963

SOURCES RELEASE DATE

db:CNVDid:CNVD-2025-29422date:2025-11-26T00:00:00
db:NVDid:CVE-2025-65221date:2025-11-20T15:17:40.160