How severe is CVE-2019-10634?

CVE-2019-10634 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-10634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10634?

CVE-2019-10634 affects Zyxel Nas326 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-10634 published?

CVE-2019-10634 was published on 2019-04-09 and last updated on 2026-06-17.

CVE-2019-10634

CVE-2019-10634 is a medium-severity vulnerability in Zyxel Nas326 Firmware with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Zyxel Nas326 Firmware
Published: 2019-04-09
Last modified: 2026-06-17

Description

An XSS vulnerability in the Zyxel NAS 326 version 5.21 and below allows a remote authenticated attacker to inject arbitrary JavaScript or HTML via the user, group, and file-share description fields.

Frequently asked questions

What is CVE-2019-10634?: An XSS vulnerability in the Zyxel NAS 326 version 5.21 and below allows a remote authenticated attacker to inject arbitrary JavaScript or HTML via the user, group, and file-share description fields.
How severe is CVE-2019-10634?: CVE-2019-10634 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-10634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10634?: CVE-2019-10634 affects Zyxel Nas326 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-10634 published?: CVE-2019-10634 was published on 2019-04-09 and last updated on 2026-06-17.

References

http://maxwelldulin.com/BlogPost?post=3236967424

Affected products (1)

cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*

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