CVE-2019-9955 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting numerous Zyxel firewall and VPN devices, including various ATP, USG, and ZyWALL series. This medium-severity flaw (CVSS 6.1) allows an unauthenticated attacker to inject malicious scripts into the security firewall login page by manipulating the 'mp_idx' parameter, potentially leading to information disclosure or limited integrity compromise. While there is no evidence of active exploitation in the wild, public exploit code is available via ExploitDB and Nuclei templates, indicating a readily exploitable condition. Community discussion and media coverage for this CVE are minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.31CPE matchmatch criteria | cpe:2.3:o:zyxel:atp200_firmware:4.31:*:*:*:*:*:*:* | ||
4.31CPE matchmatch criteria | cpe:2.3:o:zyxel:atp500_firmware:4.31:*:*:*:*:*:*:* | ||
4.31CPE matchmatch criteria | cpe:2.3:o:zyxel:atp800_firmware:4.31:*:*:*:*:*:*:* | ||
4.31CPE matchmatch criteria | cpe:2.3:o:zyxel:usg20-vpn_firmware:4.31:*:*:*:*:*:*:* | ||
4.31CPE matchmatch criteria | cpe:2.3:o:zyxel:usg20w-vpn_firmware:4.31:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.