What is CVE-2026-76955?

CVE-2026-76955 is a high-severity vulnerability in Zyxel Nwa110ax Firmware, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-11-03.

How severe is CVE-2026-76955?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Zyxel Nwa110ax Firmware

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 attacker to escalate privileges on an affected device.

Vulnerability class: Buffer Overflow

Published 2026-11-03.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Zyxel Nwa110ax Firmware — versions <= 7.12(ABTG.0)C0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory)

Frequently asked questions

What is CVE-2026-76955?: CVE-2026-76955 is a high-severity vulnerability in Zyxel Nwa110ax Firmware, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2026-11-03.
How severe is CVE-2026-76955?: High severity. CVSS v3 base score is 8.8 out of 10.