A18 Firmware
CVE-2026-2876
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessAuthenticate to Tenda A18 web interface
-
DeliverySend crafted POST request to /goform/setBlackRule
-
ExploitInject oversized deviceList parameter
-
ExecutionTrigger stack buffer overflow
-
ImpactExecute arbitrary code
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Tenda A18 firmware 15.13.07.13; requires valid login credentials to access /goform/setBlackRule endpoint; stack-based buffer overflow in parse_macfilter_rule function triggered by deviceList parameter manipulation. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to compromise the affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
Stack overflow in Tenda A18 firmware version 15.13.07.13 allows remote attackers with low privileges to achieve complete system compromise through a malformed deviceList parameter in the /goform/setBlackRule endpoint. Public exploit code is available and the vulnerability remains unpatched, creating significant risk for affected devices.
Earlier versions of this analysis (1)
A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. [CVSS 8.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-119 (Buffer Overflow). Affects A18 Firmware. A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.
Know when A18 Firmware gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.
Executive ViewAI
A HIGH severity vulnerability (CVE-2026-2876, CVSS 8.8) has been identified in Tenda A18 wireless routers that could allow unauthorized remote access or command execution through the MAC filter configuration function. Organizations operating this device model should treat this as a critical risk until mitigation measures are implemented, as no vendor patch is currently available.
Restrict network access to the /goform/setBlackRule endpoint using firewall rules and WAF policies; disable remote management interfaces where operationally feasible; implement strict network segmentation to limit device access to trusted networks only; monitor for suspicious configuration changes and authentication attempts to the device; consider disabling the MAC filter feature if not operationally required; apply IP whitelisting for administrative access to the router's web interface.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
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.
Affected Products (CPE)CVE.org
More in A18 Firmware
View allTenda A18 v15.13.07.09 was discovered to contain a stack overflow via the devName parameter in the formSetDeviceName fun
Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the wpapsk_crypto2_4g parameter in the fromSetWire
Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the security parameter in the formWifiBasicSet fun
Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the rule_info parameter in the formAddMacfilterRul
An access control issue in Tenda A18 v15.13.07.09 allows unauthenticated attackers to access the Telnet service. Rated h
Tenda A18 v15.13.07.09 was discovered to contain a stack overflow via the security_5g parameter at /goform/WifiBasicSet.
Stack-based buffer overflow in Tenda A18 firmware versions up to 15.13.07.13 allows remote attackers with low privileges
Tenda A18 v15.03.05.05 firmware has a stack overflow vulnerability located via the PPW parameter in the fromWizardHandle
A vulnerability was found in Tenda A18 up to 15.13.07.09. Rated high severity (CVSS 7.1), this vulnerability is remotely
Exploit-DB