How severe is CVE-2015-5987?

CVE-2015-5987 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2015-5987 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5987?

CVE-2015-5987 affects Zyxel Gs1900-10hp Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5987?

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

When was CVE-2015-5987 published?

CVE-2015-5987 was published on 2015-12-31 and last updated on 2026-06-17.

CVE-2015-5987

CVE-2015-5987 is a high-severity vulnerability in Zyxel Gs1900-10hp Firmware with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Zyxel Gs1900-10hp Firmware
Published: 2015-12-31
Last modified: 2026-06-17

Description

Belkin F9K1102 2 devices with firmware 2.10.17 use an improper algorithm for selecting the ID value in the header of a DNS query, which makes it easier for remote attackers to spoof responses by predicting this value.

Frequently asked questions

What is CVE-2015-5987?: Belkin F9K1102 2 devices with firmware 2.10.17 use an improper algorithm for selecting the ID value in the header of a DNS query, which makes it easier for remote attackers to spoof responses by predicting this value.
How severe is CVE-2015-5987?: CVE-2015-5987 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2015-5987 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5987?: CVE-2015-5987 affects Zyxel Gs1900-10hp Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-5987 published?: CVE-2015-5987 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:*:*:*:*:*:*:*:*

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