CVE-2026-110958 Details
Description
A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: "We confirm the finding, and it has already been addressed. In the current firmware the api=info&client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked."
A heap-based buffer overflow vulnerability has been identified in the Wavlink WN530HG4B router, specifically in the firmware version M30HG4B_V260724. The issue arises in an unknown function of the file api.cgi, where improper handling allows for remote exploitation. This vulnerability has been made public and could be actively exploited.
Users are advised to upgrade to the Wavlink WN530HG4B firmware version 2026-09-24-841a51c6d5_tclinux.bin, which addresses the vulnerability by modifying the way the login script is invoked, eliminating the use of system() for command execution and implementing length limitations and null-checks on the client address.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://dl.wavlink.com/firmware/RD/WN530BE2_WAVLINK-WO-2026-09-24-841a51c6d5_tclinux.bin | [email protected] | Broken LinkVendor |
| https://drive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_link | [email protected] | ExploitPartial Content |
| https://vuldb.com/cve/CVE-2026-110958 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/933388 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/420571 | [email protected] | Content Wall |
| https://vuldb.com/vuln/420571/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Wavlink WN530HG4B | M30HG4B_V260724 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 15, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |