Tenda W15E
CVE-2026-36813
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessIdentify exposed W15E management interface
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DeliveryCraft HTTP request with oversized picCropName
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ExploitSend to formCropAndSetWewifiPic endpoint
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ExecutionOverflow stack buffer in handler
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PersistCrash web service or device
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ImpactSustained network outage
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Stack buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Exploitation requires network reachability to the Tenda W15E's HTTP management interface and the ability to send a request to the formCropAndSetWewifiPic endpoint with an attacker-controlled picCropName parameter; no authentication or user interaction is required per CVSS PR:N/UI:N. The device must be running firmware version 15.11.0.10 specifically. The principal limiting factor is that most W15E deployments expose the management interface only on the LAN/management VLAN rather than the WAN, so internet-based exploitation depends on misconfigured remote administration. Impact is restricted to denial of service - the vector explicitly rules out confidentiality or integrity compromise, so this cannot be used as a foothold for further attack stages. |
| Impact | The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H scores 7.5 (High), reflecting remote, unauthenticated, low-complexity exploitation with availability-only impact (no confidentiality or integrity loss). EPSS at 0.01% (2nd percentile) is exceptionally low, suggesting researchers have not observed in-the-wild scanning or exploit weaponization, consistent with no KEV listing. The CWE-121 classification could theoretically support memory corruption beyond DoS, but the description and CVSS explicitly bound impact to availability - meaning the researcher either did not demonstrate code execution or memory protections on the device prevented it. Overall this is a real but lower-tier priority: meaningful for exposed management interfaces but unlikely to be mass-exploited. Note also that the only reference is a third-party research repo rather than a Tenda vendor advisory, so patch status and remediation guidance are not confirmed by the vendor. |
| Exploit ScenarioDerived | An attacker on the same network segment as the W15E (or via an exposed WAN management interface) sends a single crafted HTTP POST to the formCropAndSetWewifiPic endpoint with an oversized picCropName parameter, overflowing the stack buffer and crashing the web service or the entire device. Repeated requests keep the router offline, disrupting WiFi and wired connectivity for all users behind it. A research artifact exists in the SemVulLLM GitHub repository, but no public exploit identified at time of analysis. |
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Alert meAnalysisAIv1 – Jun 10, 2026
Denial of service in Tenda W15E router firmware version 15.11.0.10 allows remote unauthenticated attackers to crash the device by sending a crafted HTTP request that triggers a stack-based buffer overflow in the picCropName parameter of the formCropAndSetWewifiPic function. No public exploit identified at time of analysis, and EPSS scoring of 0.01% indicates very low predicted exploitation probability, though a research repository hosting analysis artifacts exists on GitHub.
RemediationAI
No vendor-released patch identified at time of analysis, and no Tenda advisory URL is included in the references. Administrators should monitor Tenda's official support channels (tendacn.com) for firmware updates beyond 15.11.0.10 addressing the formCropAndSetWewifiPic handler. As compensating controls, restrict access to the device's HTTP management interface to a dedicated management VLAN or specific administrator IP addresses via ACLs, which prevents untrusted networks from reaching the vulnerable endpoint at the cost of requiring administrators to connect from authorized locations. Disabling remote/WAN-side web administration if enabled eliminates internet-facing exposure but blocks legitimate remote management. If the device is end-of-life or no patch materializes, plan replacement with a supported model, since DoS of an access point/router disrupts all downstream connectivity.
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Technical ContextAI · show details
The Tenda W15E is an enterprise-grade wireless access point/router commonly deployed in small-to-medium business environments. The vulnerability resides in the formCropAndSetWewifiPic handler, which processes WiFi picture cropping requests via the device's HTTP-based web management interface. The flaw is classified as CWE-121 (Stack-Based Buffer Overflow), meaning user-supplied input for the picCropName parameter is copied into a fixed-size stack buffer without adequate length validation, corrupting the call stack and crashing the embedded HTTP server process. The CPE data is generic (cpe:2.3:a:n/a:n/a) and does not pin the affected product in NVD's structured format, so identification relies on the description text and the linked research repository (xhh0124/SemVulLLM).
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from Vendor (mitre) · only source for this CVE.
CVSS VectorVendor: mitre
Lifecycle Timeline
2DescriptionCVE.org
Shenzhen Tenda Technology Co., Ltd Tenda W15E v15.11.0.10 was discovered to contain a buffer overflow in the picCropName parameter of the formCropAndSetWewifiPic function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
Executive ViewAI
Tenda W15E routers running firmware 15.11.0.10 are vulnerable to remote denial-of-service attacks that crash the device, creating potential network outages and business continuity risk. The vulnerability is remotely triggerable without authentication via a single malformed HTTP request. Organizations using this router model should prioritize identifying affected devices and restricting their network exposure.
Restrict HTTP/HTTPS management interface access via firewall rules to internal networks only; disable remote management if operationally feasible; implement network segmentation isolating vulnerable routers from untrusted network segments; configure network-based detection signatures for malformed HTTP requests targeting the picCropName parameter; establish monitoring for unexpected device reboots indicative of exploitation attempts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A stack-based buffer overflow occurs when a program writes more data to a buffer located on the stack than it was allocated to hold.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
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