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CVE-2019-9955
On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900,…
Medium6.1EPSS 21.2%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200-VPN, ZyWALL 110, ZyWALL 310, ZyWALL 1100 devices, the security firewall login page is vulnerable to Reflected XSS via the unsanitized 'mp_idx' parameter.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 21.2% · top 2.4% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Weakness
Affected products
n/a
- affected n/a
References (5)
- https://www.securitymetrics.com/blog/Zyxel-Devices-Vulnerable-Cross-Site-Scripting-Login-page (opens in a new tab)x_refsource_MISCx_transferred
- 20190416 CVE-2019-9955 Refelected XSS on Zyxel Login page (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- 46706 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- http://packetstormsecurity.com/files/152525/Zyxel-ZyWall-Cross-Site-Scripting.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.zyxel.com/support/reflected-cross-site-scripting-vulnerability-of-firewalls.shtml (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-9955)Record last updated .