# CVE-2026-90604: Totolink A3002MU cross-site scripting in web interface

Source: https://junglewise.ai/threats/cve-2026-90604-totolink-a3002mu-cross-site-scripting-in-web-interface  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-90604 · Severity: low · CVSS 3.5 · Published 2026-09-14

The Totolink A3002MU wireless router is vulnerable to cross-site scripting (XSS) in its web-based management interface. An attacker can craft a malicious URL that, when opened by an authenticated administrator, executes arbitrary JavaScript code in the browser. This can allow the attacker to steal the administrator's session credentials and take control of the router's configuration.

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

## Quick answers

**Is CVE-2026-90604 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90604 being exploited in the wild.

**How severe is CVE-2026-90604?** Low severity, with a CVSS score of 3.5, published 14 September 2026.

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

**Is there a fix for CVE-2026-90604?** 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-2026-90604 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-90604?** 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 reflected XSS vulnerability exists in multiple pages of the Totolink A3002MU web interface (portfw.htm, reboot.htm, arptbl.htm, etc.). The vulnerability stems from insufficient validation and escaping of URL fragment content (#), which is directly passed to eval() function execution. The attack requires the victim to be already authenticated to the router's management interface and to click a malicious link. An attacker can craft URLs containing arbitrary JavaScript that will execute in the authenticated context, enabling session token theft and other actions. The vulnerability affects firmware version Hh-B20211125.1046 and has public exploit code available.

## Affected products

- Totolink A3002MU Hh-B20211125.1046

## Timeline

- 2026-09-14: disclosed
- other: Public exploit code available

## References

- [https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3002MU/XSS_A3002MU.md](https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3002MU/XSS_A3002MU.md)
- [https://vuldb.com/cve/CVE-2026-90604](https://vuldb.com/cve/CVE-2026-90604)

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- [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)
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- [Totolink A3002MU buffer overflow in formWlWds](https://junglewise.ai/threats/cve-2026-93741-a-security-flaw-has-been-discovered-in-totolink-a3002mu-hh)