Wl Wn579x3 C Firmware
CVE-2026-3715
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Wavlink WL-WN579X3-C device
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ExploitSend crafted del_flag parameter to /cgi-bin/firewall.cgi
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ExecutionTrigger stack buffer overflow
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ImpactExecute arbitrary code with device privileges
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A06:2021 - Vulnerable and Outdated Components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 | Valid login credentials required for Wavlink WL-WN579X3-C firmware before version 20260226. Attacker must access /cgi-bin/firewall.cgi endpoint with authentication. Vulnerable firmware versions: up to 231124. |
| Impact | CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker could exploit this flaw, stack-based buffer overflow. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Wavlink WL-WN579X3-C firmware through stack-based buffer overflow in the firewall.cgi module allows unauthenticated attackers to achieve complete system compromise via manipulation of the del_flag parameter. Public exploit code exists for this vulnerability, and no patch is currently available despite vendor notification. Affected users should immediately restrict network access to the affected device until a firmware update becomes available.
Earlier versions of this analysis (1)
A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. [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 Wl-Wn579X3-C Firmware. A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner an
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- Exploit and PoC references, threat intelligence from 22 sources
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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
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability was found in Wavlink WL-WN579X3-C 231124. This affects the function sub_40139C of the file /cgi-bin/firewall.cgi. Performing a manipulation of the argument del_flag results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used. Upgrading to version 20260226 is able to mitigate this issue. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Executive ViewAI
A high-severity vulnerability (CVSS 8.8) affecting Wavlink WL-WN579X3-C wireless devices could allow attackers to compromise network security through the firewall configuration interface. Organizations using this device model face immediate risk of unauthorized access and potential network breach, particularly since exploit code is publicly available and no vendor patch has been released.
Implement Web Application Firewall (WAF) rules to block requests to /cgi-bin/firewall.cgi endpoint; restrict administrative access to the device via network segmentation and firewall rules limiting access to trusted IP ranges only; disable remote management functions if not operationally required; monitor firewall logs and authentication attempts on affected devices; consider isolating vulnerable devices to a dedicated VLAN with restricted egress; implement intrusion detection/prevention signatures to detect exploitation attempts; contact Wavlink for temporary workarounds or rollback to earlier firmware versions if available.
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.
Exploit-DB