How severe is CVE-2015-5988?

CVE-2015-5988 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-5988 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5988?

CVE-2015-5988 affects Zyxel Gs1900-10hp Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5988?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-5988 published?

CVE-2015-5988 was published on 2015-12-31 and last updated on 2026-06-17.

CVE-2015-5988

CVE-2015-5988 is a critical-severity vulnerability in Zyxel Gs1900-10hp Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-255.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 9.3
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Zyxel Gs1900-10hp Firmware
Published: 2015-12-31
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2015-5988?: CVE-2015-5988 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-5988 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5988?: CVE-2015-5988 affects Zyxel Gs1900-10hp Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5988?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-5988 published?: CVE-2015-5988 was published on 2015-12-31 and last updated on 2026-06-17.

References

https://www.kb.cert.org/vuls/id/201168

Affected products (1)

cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Zyxel Gs1900-10hp Firmware

CVE-2019-15800 — Critical (CVSS 9.8): An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Due to lack of input validation in…
CVE-2016-1329 — Critical (CVSS 9.8): Cisco NX-OS 6.0(2)U6(1) through 6.0(2)U6(5) on Nexus 3000 devices and 6.0(2)A6(1) through 6.0(2)A6(5) and 6.0(2)A7(1)…
CVE-2015-5989 — Critical (CVSS 9.8): Belkin F9K1102 2 devices with firmware 2.10.17 rely on client-side JavaScript code for authorization, which allows…
CVE-2019-15803 — Critical (CVSS 9.1): An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence…
CVE-2019-15799 — High (CVSS 8.8): An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the…
CVE-2016-1302 — High (CVSS 8.8): Cisco Application Policy Infrastructure Controller (APIC) devices with software before 1.0(3h) and 1.1 before 1.1(1j)…

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