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01 Record

CVE-2023-35139

A cross-site scripting (XSS) vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50(W) series

MediumPUBLISHEDCNA: Zyxel
CNA base score5.2 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

02 Description

A cross-site scripting (XSS) vulnerability in the CGI program of the Zyxel ATP series firmware versions 5.10 through 5.37, USG FLEX series firmware versions 5.00 through 5.37, USG FLEX 50(W) series

03 Exploitation and scoring

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
0.46% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 39.8% 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:3.1/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.

04 Metadata

Published
2023-11-28 01:22Z2 YR AGO
Last updated
2024-08-02 16:23Z2 YR AGO
Reserved
2023-06-14
Assigning CNA
Zyxel
Record state
PUBLISHED
Severity
Medium (CVSS 5.2)
CNA CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.1
Document digest
6803977d2110e7cc4a195b3a668f185487c5546e3e089816a99dd4c8c3eee20f

05 Affected products

VendorProductVersionsPlatforms
ZyxelATP series firmwareversions 5.10 through 5.37—
ZyxelUSG FLEX series firmwareversions 5.00 through 5.37—
ZyxelUSG FLEX 50(W) series firmwareversions 5.10 through 5.37—
ZyxelUSG20(W)-VPN series firmwareversions 5.10 through 5.37—
ZyxelVPN series firmwareversions 5.00 through 5.37—

06 References