CVE-2022-37055: D-Link GO-RT-AC750 buffer overflow in cgibin and hnap_main

CVE-2022-37055 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2025-12-08

A critical security vulnerability has been identified in certain D-Link GO-RT-AC750 routers, which are used to provide wireless internet connectivity in homes and small offices. This flaw allows an attacker to remotely take control of the device without needing a password, potentially leading to the theft of sensitive data, monitoring of internet traffic, or complete service disruption. Because these devices are considered end-of-life, the manufacturer may not provide further security updates, and users are strongly advised to replace the affected hardware.

Vendors: D-Link.

Quick answers

Is CVE-2022-37055 exploited in the wild?
Yes. CVE-2022-37055 is known to be exploited in the wild, first recorded on 8 December 2025. Treat it as urgent.
How severe is CVE-2022-37055?
Critical severity, with a CVSS score of 9.8, published 8 December 2025.
Which products and versions are affected?
D-Link GO-RT-AC750 firmware 1.01b03 (Rev A), 2.00b02 (Rev B).
Is there a fix for CVE-2022-37055?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2022-37055 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2022-37055?
Check whether you run D-Link GO-RT-AC750 firmware or D-Link Routers at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A classic buffer overflow (CWE-120) exists in the D-Link GO-RT-AC750 router within the 'cgibin' and 'hnap_main' components. The vulnerability is caused by insufficient input validation when processing network requests, allowing a remote, unauthenticated attacker to trigger a buffer overflow via the network. Successful exploitation can lead to arbitrary code execution with high privileges, compromising the confidentiality, integrity, and availability of the device. This vulnerability has been observed in the wild and is included in the CISA Known Exploited Vulnerabilities (KEV) catalog. Affected devices are end-of-life (EoL), and users are advised to discontinue use.

Affected products

  • D-Link GO-RT-AC750 firmware 1.01b03 (Rev A), 2.00b02 (Rev B)

Timeline

  • 2022-08-28: disclosed: Initial NVD publication
  • 2025-12-08: kev added: Added to CISA Known Exploited Vulnerabilities catalog

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