# CVE-2026-89177: Howyar WeenyGenius insecure protocol vulnerability in ZMTP

Source: https://junglewise.ai/threats/cve-2026-89177-howyar-weenygenius-insecure-protocol-vulnerability-in-zmtp  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-11. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-89177 · Severity: high · CVSS 8.8 · Published 2026-09-11

WeenyGenius is a computer lab management system used to control and monitor student computer stations in educational environments. CVE-2026-89177 allows attackers on the same network to intercept unencrypted traffic and capture sensitive data transmitted between teacher and student computers, or inject forged commands to disrupt classroom operations and compromise system integrity.

Technologies: [Howyar WeenyGenius](https://junglewise.ai/threats/technologies/weenygenius). Vendors: [Howyar](https://junglewise.ai/threats/vendors/howyar).

## Quick answers

**Is CVE-2026-89177 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89177 being exploited in the wild.

**How severe is CVE-2026-89177?** High severity, with a CVSS score of 8.8, published 11 September 2026.

**Which products and versions are affected?** Howyar WeenyGenius 12.2.031 and earlier.

**Is there a fix for CVE-2026-89177?** 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-2026-89177 attacked?** It is attacked from the adjacent network, in a network appliance.

**Am I affected by CVE-2026-89177?** Check whether you run Howyar WeenyGenius 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

The vulnerability is a use of insecure protocol (CWE-319) stemming from WeenyGenius's reliance on ZMTP Null mode, which provides no encryption or authentication. Unauthenticated attackers on the same network segment can perform passive packet capture to leak transmitted data or active replay attacks to inject forged commands. The attack requires network adjacency but no authentication, user interaction, or special privileges. An attacker can disrupt classroom operations by replaying or forging control messages. The vulnerability affects version 12.2.031 and earlier; patched versions 12.3.033 and later are available.

## Affected products

- Howyar WeenyGenius 12.2.031 and earlier

## Timeline

- 2026-09-11: disclosed

## References

- [https://www.twcert.org.tw/en/cp-139-11200-ffc3c-2.html](https://www.twcert.org.tw/en/cp-139-11200-ffc3c-2.html)
- [https://www.twcert.org.tw/tw/cp-132-11201-658c0-1.html](https://www.twcert.org.tw/tw/cp-132-11201-658c0-1.html)

## Related threats

- [Howyar WeenyGenius missing integrity check in ZMTP](https://junglewise.ai/threats/cve-2026-89179-howyar-weenygenius-missing-integrity-check-in-zmtp)
- [Howyar WeenyGenius origin validation error in teacher workstation spoofing](https://junglewise.ai/threats/cve-2026-89178-howyar-weenygenius-origin-validation-error-in-teacher-workstation)