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01 Record

CVE-2023-22918

A post-authentication information exposure vulnerability in the CGI program of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W)

MediumPUBLISHEDCNA: Zyxel
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

02 Description

A post-authentication information exposure vulnerability in the CGI program of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W)

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.77% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 55.1% of scored records. A rank, not a probability.
NVD base score
6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
2023-04-24 00:00Z3 YR AGO
Last updated
2025-02-12 16:01Z1 YR AGO
Reserved
2023-01-10
Assigning CNA
Zyxel
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-359Exposure of Private Personal Information to an Unauthorized ActorBase
Data version
5.1
Document digest
ef63cacaec156b2edbaeabbe35d5b4dacd3710b626fd32aad4dbb7d91a64f8cd

05 Affected products

VendorProductVersionsPlatforms
ZyxelATP series firmware4.32 through 5.35—
ZyxelUSG FLEX series firmware4.50 through 5.35—
ZyxelUSG FLEX 50(W) firmware4.16 through 5.35—
ZyxelUSG20(W)-VPN firmware4.16 through 5.35—
ZyxelVPN series firmware4.30 through 5.35—
ZyxelNWA110AX firmware<= 6.50(ABTG.2)—
ZyxelWAC500 firmware<= 6.50(ABVS.0)—
ZyxelWAX510D firmware<= 6.50(ABTF.2)—

06 References