# CVE-2026-93738: Totolink A3002MU buffer overflow in formSchedule

Source: https://junglewise.ai/threats/cve-2026-93738-a-vulnerability-was-found-in-totolink-a3002mu-hh-b20211125-1046  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-93738 · Severity: critical · CVSS 9.9 · Published 2026-09-18

The Totolink A3002MU wireless router contains a buffer overflow vulnerability in its web management interface. An attacker can remotely send a specially crafted HTTP request to crash the web server, causing the router to become unresponsive and unable to be managed. The vulnerability can be exploited over the network without requiring authentication, and proof-of-concept code has been publicly released.

Technologies: [TOTOLINK A3002MU](https://junglewise.ai/threats/technologies/a3002mu). Vendors: [TOTOLINK](https://junglewise.ai/threats/vendors/totolink).

## Quick answers

**Is CVE-2026-93738 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93738 being exploited in the wild.

**How severe is CVE-2026-93738?** Critical severity, with a CVSS score of 9.9, published 18 September 2026.

**Which products and versions are affected?** TOTOLINK A3002MU Hh-B20211125.1046.

**Is there a fix for CVE-2026-93738?** 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-2026-93738 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-93738?** Check whether you run TOTOLINK A3002MU 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 buffer overflow exists in the /boafrm/formSchedule endpoint of the Boa web server, where the webpage parameter is copied into a fixed-size buffer without proper length validation. An attacker can send an HTTP POST request with an oversized webpage parameter value to overflow the buffer and corrupt adjacent memory, crashing the Boa process. This results in denial of service, preventing legitimate access to the router's management interface.

## Affected products

- Totolink A3002MU Hh-B20211125.1046

## Timeline

- 2026-09-18: disclosed
- other: Public exploit published

## References

- [https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3002MU/bof-formSchedule.md](https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3002MU/bof-formSchedule.md)
- [https://vuldb.com/cve/CVE-2026-93738](https://vuldb.com/cve/CVE-2026-93738)

## Related threats

- [Totolink A3002MU path traversal in file upload handler](https://junglewise.ai/threats/cve-2026-105286-a-vulnerability-was-detected-in-totolink-a3002mu-1-0-0-b20230403)
- [Totolink A3002MU stack buffer overflow in QoS handler](https://junglewise.ai/threats/cve-2026-105285-a-security-vulnerability-has-been-detected-in-totolink-a3002mu-1)
- [Totolink A3002MU authentication bypass in bin/boa](https://junglewise.ai/threats/cve-2026-105284-a-weakness-has-been-identified-in-totolink-a3002mu-1-0-0)
- [Totolink A3002MU command injection in formWsc](https://junglewise.ai/threats/cve-2026-93742-a-weakness-has-been-identified-in-totolink-a3002mu-hh-b20211125)
- [Totolink A3002MU buffer overflow in formWlWds](https://junglewise.ai/threats/cve-2026-93741-a-security-flaw-has-been-discovered-in-totolink-a3002mu-hh)