How severe is CVE-2017-15226?

CVE-2017-15226 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-2017-15226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15226?

CVE-2017-15226 affects Zyxel Nbg6716 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15226?

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-2017-15226 published?

CVE-2017-15226 was published on 2017-10-10 and last updated on 2026-06-17.

CVE-2017-15226

CVE-2017-15226 is a critical-severity vulnerability in Zyxel Nbg6716 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Zyxel Nbg6716 Firmware
Published: 2017-10-10
Last modified: 2026-06-17

Description

Zyxel NBG6716 V1.00(AAKG.9)C0 devices allow command injection in the ozkerz component because beginIndex and endIndex are used directly in a popen call.

Frequently asked questions

What is CVE-2017-15226?: Zyxel NBG6716 V1.00(AAKG.9)C0 devices allow command injection in the ozkerz component because beginIndex and endIndex are used directly in a popen call.
How severe is CVE-2017-15226?: CVE-2017-15226 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-2017-15226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15226?: CVE-2017-15226 affects Zyxel Nbg6716 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15226?: 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-2017-15226 published?: CVE-2017-15226 was published on 2017-10-10 and last updated on 2026-06-17.

References

https://www.secarma.co.uk/labs/sohopelessly-broken-0-day-strategy/

Affected products (1)

cpe:2.3:o:zyxel:nbg6716_firmware:1.00\(aakg.9\)c0:*:*:*:*:*:*:*

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