| Title | Wavlink WN530HG4B M30HG4B_V260724 Heap-based Buffer Overflow |
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| Description | This vulnerability is a pre-auth RCE vulnerability found in the latest firmware (M30HG4B_V260724) of WAVLINK's WN530HG4B product. It is triggered by manipulating heap chunk metadata through a heap overflow. An attacker can supply input to api.cgi, and because the code copies user-supplied untrusted input without checking its length, the vulnerability occurs. The RCE vulnerability was successfully exploited using single binary emulation with QEMU. For further details, please refer to the advisory/exploit link below. Here is the link to download the lastest firmware of WN530HG4B: https://docs.wavlink.xyz/Firmware/?category=Router&model=WL-WN530HG4B |
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| Source | ⚠️ https://drive.google.com/file/d/12OOh8g9YDCbD-Q4cc52J6TH9KuOoD44A/view?usp=drive_link |
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| User | aissac (UID 100146) |
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| Submission | 08/16/2026 14:33 (2 months ago) |
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| Moderation | 10/15/2026 11:31 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 420571 [Wavlink WN530HG4B M30HG4B_V260724 api.cgi heap-based overflow] |
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| Points | 20 |
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