How severe is CVE-2026-7256?

CVE-2026-7256 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7256 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7256?

CVE-2026-7256 affects Zyxel Wre6505 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7256?

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.

Does CVE-2026-7256 have an EU (EUVD) identifier?

Yes. CVE-2026-7256 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29376.

When was CVE-2026-7256 published?

CVE-2026-7256 was published on 2026-05-12 and last updated on 2026-06-17.

CVE-2026-7256

CVE-2026-7256 is a high-severity vulnerability in Zyxel Wre6505 Firmware with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-29376
Weakness: CWE-78
Affected product: Zyxel Wre6505 Firmware
Published: 2026-05-12
Last modified: 2026-06-17

Description

** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to execute operating system (OS) commands on a vulnerable device by sending a crafted HTTP request.

Frequently asked questions

What is CVE-2026-7256?: ** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to execute operating system (OS) commands on a vulnerable device by sending a crafted HTTP request.
How severe is CVE-2026-7256?: CVE-2026-7256 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7256 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7256?: CVE-2026-7256 affects Zyxel Wre6505 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7256?: 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.
Does CVE-2026-7256 have an EU (EUVD) identifier?: Yes. CVE-2026-7256 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29376.
When was CVE-2026-7256 published?: CVE-2026-7256 was published on 2026-05-12 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/end-of-life

Affected products (1)

cpe:2.3:o:zyxel:wre6505_firmware:v1.00\(abdv.3\)c0:*:*:*:*:*:*:*

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