What is CVE-2018-25134?

CVE-2018-25134 is a critical-severity vulnerability in Synaccess Networks Inc. Netbooter Np-02x/np-08x, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-12-24.

How severe is CVE-2018-25134?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Synaccess Networks Inc. Netbooter Np-02x/np-08x

CVE-2018-25134

Synaccess netBooter NP-02x/NP-08x 6.8 contains an authentication bypass vulnerability in the webNewAcct.cgi script that allows unauthenticated attackers to create admin user accounts. Attackers can exploit the missing control check by sending crafted POST requests to create administrative accounts and gain unauthorized control over power supply management.

Vulnerability class: Broken Authentication

Published 2025-12-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000

Affected products

Synaccess Networks Inc. Netbooter Np-02x/np-08x — versions 6.8C, 6.5C, 6.4BC

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.exploit-db.com/exploits/45920 (exploit)
www.synaccess-net.com (product)
www.zeroscience.mk/en/vulnerabilities/ZSL-2018-5500.php (third-party-advisory)

Frequently asked questions

What is CVE-2018-25134?: CVE-2018-25134 is a critical-severity vulnerability in Synaccess Networks Inc. Netbooter Np-02x/np-08x, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-12-24.
How severe is CVE-2018-25134?: Critical severity. CVSS v3 base score is 9.8 out of 10.