What is CVE-2015-5988?

CVE-2015-5988 is a critical-severity vulnerability in Zyxel Gs1900-10hp Firmware, classified under CWE-255. CVSS score: 9.8/10. Published 2015-12-31.

How severe is CVE-2015-5988?

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

Is CVE-2015-5988 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Zyxel Gs1900-10hp Firmware

CVE-2015-5988

The web management interface on Belkin F9K1102 2 devices with firmware 2.10.17 has a blank password, which allows remote attackers to obtain administrative privileges by leveraging a LAN session.

Published 2015-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.7th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Zyxel Gs1900-10hp Firmware

Weakness classification (CWE)

CWE-255

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

www.kb.cert.org/vuls/id/201168 (US Government Resource, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2015-5988?: CVE-2015-5988 is a critical-severity vulnerability in Zyxel Gs1900-10hp Firmware, classified under CWE-255. CVSS score: 9.8/10. Published 2015-12-31.
How severe is CVE-2015-5988?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2015-5988 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.