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Tenda BE12 Pro CVE-2026-15696

| EUVDEUVD-2026-43691 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-07-14 VulDB GHSA-h9wr-9gfr-4wqp
Tenda Buffer Overflow Stack Overflow Be12 Pro
7.4
CVSS 4.0 · Vendor: VulDB
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Severity by source

Vendor (VulDB) PRIMARY
7.4 HIGH
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/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
8.8 HIGH

Network-reachable web endpoint (AV:N, AC:L) requiring a valid low-privilege management session (PR:L, UI:N); stack overflow in root-run httpd yields full C/I/A impact.

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

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

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

Lifecycle Timeline

3
Analysis Generated
Jul 14, 2026 - 15:33 vuln.today
CVSS changed
Jul 14, 2026 - 15:22 NVD
8.7 (HIGH) 7.4 (HIGH)
CVE Published
Jul 14, 2026 - 14:45 cve.org
HIGH 7.4

DescriptionCVE.org

A vulnerability has been found in Tenda BE12 Pro 16.03.66.23. The impacted element is the function fromVirtualSer of the file /goform/VirtualSer. Such manipulation of the argument page leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

Stack-based buffer overflow in the Tenda BE12 Pro router (firmware 16.03.66.23) allows remote attackers to corrupt memory via the fromVirtualSer handler for the /goform/VirtualSer endpoint by supplying an oversized 'page' argument. The flaw carries CVSS 4.0 7.4 and, per its vector, requires low-level privileges (PR:L); publicly available exploit code exists, though there is no public exploit identified as actively used in the wild (not in CISA KEV). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Reach router web management interface
Delivery
Authenticate with low-privilege/default credentials
Exploit
Send crafted POST to /goform/VirtualSer with oversized 'page'
Install
Overflow fixed-size stack buffer in fromVirtualSer
C2
Overwrite saved return address
Execute
Execute code as root or crash httpd
Impact
Full device compromise or denial of service
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Vulnerability AssessmentAI

Exploitation Exploitation targets the specific /goform/VirtualSer endpoint and its fromVirtualSer handler on Tenda BE12 Pro firmware 16.03.66.23, triggered by an overly long 'page' parameter. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Signals are mixed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who can reach the router's web management interface (e.g., an authenticated LAN user, a device with obtained/default admin credentials, or via an exposed panel) sends a crafted POST to /goform/VirtualSer with an oversized 'page' argument. The oversized value overflows a fixed-size stack buffer in fromVirtualSer, overwriting the return address to crash the httpd service (denial of service) or, with a tailored payload, execute attacker-controlled code as root. …
Remediation No vendor-released patch identified at time of analysis - Tenda had not published a fixed firmware version in the provided data, so monitor https://www.tenda.com.cn/ for a firmware update for the BE12 Pro superseding 16.03.66.23 and apply it once released. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: audit the network to identify all Tenda BE12 Pro routers with firmware 16.03.66.23 and implement firewall rules to block external access to the /goform/VirtualSer endpoint. …

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CVE-2026-15696 vulnerability details – vuln.today
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