CVE-2019-9955

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

21.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 97.4% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-04-22 19:38Z7 YR AGO

Last updated

2024-08-04 22:10Z2 YR AGO

Reserved

2019-03-23

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

6cc0825c753544fe060710df207d661c7756c2c9101e104a1205d11702d86a87

• www.securitymetrics.comhttps://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-pagex_refsource_MISC
• seclists.org20190416 CVE-2019-9955 Refelected XSS on Zyxel Login pagehttp://seclists.org/fulldisclosure/2019/Apr/22mailing-listx_refsource_FULLDISC
• www.exploit-db.com46706https://www.exploit-db.com/exploits/46706/exploitx_refsource_EXPLOIT-DB
• packetstormsecurity.comhttp://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.htmlx_refsource_MISC
• www.zyxel.comhttps://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtmlx_refsource_CONFIRM