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Tenda HG10 EUVDEUVD-2026-72049

| CVE-2026-86165 HIGH
Classic Buffer Overflow (CWE-120)
2026-09-06 VulDB GHSA-rpvc-23w4-j8mm
8.9
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
8.9 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.8 CRITICAL

Network-reachable unauthenticated POST handler; no privileges required; full CIA impact from stack/heap overflow enabling code execution as root.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

7
POC Analysis Generated
Sep 06, 2026 - 11:21 vuln.today
Analysis Updated
Sep 06, 2026 - 04:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 06, 2026 - 04:22 vuln.today
cvss_changed
Severity Changed
Sep 06, 2026 - 04:22 NVD
CRITICAL HIGH
CVSS changed
Sep 06, 2026 - 04:22 NVD
9.3 (CRITICAL) 8.9 (HIGH)
Analysis Generated
Sep 06, 2026 - 03:59 vuln.today
CVE Published
Sep 06, 2026 - 03:30 cve.org
CRITICAL 9.3

DescriptionCVE.org

A vulnerability was found in Tenda HG10 300001138. This vulnerability affects the function formURL of the file /boaform/admin/formURL. Performing a manipulation of the argument Keywd/urlFQDN results in buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used.

AnalysisAI

Remote unauthenticated buffer overflow in Tenda HG10 firmware 300001138 allows network attackers to corrupt memory and likely achieve code execution via the formURL function at /boaform/admin/formURL. Oversized values in the Keywd or urlFQDN parameters are copied into a fixed-size buffer without length validation (CWE-120), with full confidentiality, integrity, and availability impact per the CVSS 4.0 vector. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation The CVSS 4.0 vector (PR:N/UI:N/AC:L/AT:N) indicates no authentication, no user interaction, and no special configuration is required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H) scores 8.9, reflecting unauthenticated network exploitation with full CIA impact and no special preconditions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all Tenda HG10 devices in your network and verify which are running firmware version 300001138; isolate any production-critical devices to a restricted network segment. …

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EUVD-2026-72049 vulnerability details – vuln.today

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