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CVE Vulnerability Details :
CVE-2026-7273
PUBLISHED
More InfoOfficial Page
Assigner-Zyxel
Assigner Org ID-96e50032-ad0d-4058-a115-4d2c13821f9f
View Known Exploited Vulnerability (KEV) details
Published At-16 Jun, 2026 | 02:20
Updated At-18 Jun, 2026 | 03:55
Rejected At-
▼CVE Numbering Authority (CNA)

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

Affected Products
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-48HPv2 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(ABTQ.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-8 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHH.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-8HP firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHI.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-10HP firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAZI.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-16 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHJ.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-24 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHL.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-24E firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHK.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-24EP firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(ABTO.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-24HPv2 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(ABTP.1)C0
Vendor
Zyxel Networks CorporationZyxel
Product
GS1900-48 firmware
Default Status
unaffected
Versions
Affected
  • <= 2.90(AAHN.1)C0
Problem Types
TypeCWE IDDescription
CWECWE-121CWE-121 Stack-based buffer overflow
Type: CWE
CWE ID: CWE-121
Description: CWE-121 Stack-based buffer overflow
Metrics
VersionBase scoreBase severityVector
3.18.8HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026
vendor-advisory
Hyperlink: https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026
Resource:
vendor-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found