CVE-2023-35139

🗓️ 28 Nov 2023 01:22:07Reported by ZyxelType

A cross-site scripting (XSS) vulnerability in Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, and VPN series firmware versions 5.10-5.37 allows storing malicious scripts, leading to cookie theft

Reporter	Title	Published	Views	Family All 11
BDU FSTEC	ZyXEL VPN CGI XSS	1 Dec 202300:00	–	bdu_fstec
Circl	CVE-2023-35139	17 Dec 202312:12	–	circl
CNNVD	Zyxel ATP Cross-Site Scripting Vulnerability	28 Nov 202300:00	–	cnnvd
Cvelist	CVE-2023-35139	28 Nov 202301:22	–	cvelist
EUVD	EUVD-2023-39169	3 Oct 202520:07	–	euvd
NCSC	Vulnerabilities fixed in Zyxel products	4 Dec 202300:00	–	ncsc
NVD	CVE-2023-35139	28 Nov 202302:15	–	nvd
osv_cve	CVE-2023-35139	28 Nov 202302:15	–	osv_cve
Prion	Cross site scripting	28 Nov 202302:15	–	prion
Positive Technologies	PT-2023-7249 · Zyxel · Zyxel Usg Flex Series +4	14 Jun 202300:00	–	ptsecurity

NVD

Node

AND

zyxel zldRange5.10–5.37

zyxel atp100Match-

zyxel atp100wMatch-

zyxel atp200Match-

zyxel atp500Match-

zyxel atp700Match-

zyxel atp800Match-

Node

AND

zyxel zldRange5.00–5.37

zyxel usg_flex_100Match-

zyxel usg_flex_100wMatch-

zyxel usg_flex_200Match-

zyxel usg_flex_50Match-

zyxel usg_flex_500Match-

zyxel usg_flex_50wMatch-

zyxel usg_flex_700Match-

Node

AND

zyxel zldRange5.10–5.37

zyxel usg_20w-vpnMatch-

zyxel vpn50wMatch-

Node

AND

zyxel zldRange5.00–5.37

zyxel vpn100Match-

zyxel vpn1000Match-

zyxel vpn300Match-

zyxel vpn50Match-

[
  {
    "defaultStatus": "unaffected",
    "product": "ATP series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "versions 5.10 through 5.37"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "USG FLEX series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": " versions 5.00 through 5.37"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": " USG FLEX 50(W) series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "versions 5.10 through 5.37"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "USG20(W)-VPN series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": " versions 5.10 through 5.37"
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "product": "VPN series firmware",
    "vendor": "Zyxel",
    "versions": [
      {
        "status": "affected",
        "version": "versions 5.00 through 5.37"
      }
    ]
  }
]

Source	Link
zyxel	www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps

17 Jun 2026 06:04Current

5.9Medium risk

Vulners AI Score5.9

CVSS 3.15.2 - 6.1

EPSS0.00462

CWE-79