CVE-2026-7273

Published Jun 16, 2026 CVSS 3.1 · 8.8 High EPSS 2.7% KEV · Listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title CGI Buffer Overflow in Zyxel GS1900 Switches Enables Remote Command Execution
Type Values Removed Values Added
Title CGI Buffer Overflow in Zyxel GS1900 Switches Enables Remote Command Execution
Type Values Removed Values Added
Title Zyxel GS1900 Switches Buffer Overflow Enables LAN Attacker to Execute OS Commands
Type Values Removed Values Added
First Time appeared Zyxel gs1900-10hp
Zyxel gs1900-16
Zyxel gs1900-24
Zyxel gs1900-24e
Zyxel gs1900-24ep
Zyxel gs1900-24hpv2
Zyxel gs1900-48
Zyxel gs1900-48hpv2
Zyxel gs1900-8
Zyxel gs1900-8hp
CPEs cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-24ep:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-24hpv2:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-48hpv2:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:*
cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*
Vendors & Products Zyxel gs1900-10hp
Zyxel gs1900-16
Zyxel gs1900-24
Zyxel gs1900-24e
Zyxel gs1900-24ep
Zyxel gs1900-24hpv2
Zyxel gs1900-48
Zyxel gs1900-48hpv2
Zyxel gs1900-8
Zyxel gs1900-8hp
Type Values Removed Values Added
Title Zyxel GS1900 Switches Buffer Overflow Enables LAN Attacker to Execute OS Commands
Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-09-21T00:00:00+00:00', 'dueDate': '2026-09-24T00:00:00+00:00'}

Type Values Removed Values Added
Title Stack-Based Buffer Overflow in Zyxel GS1900 Switch Firmware
Type Values Removed Values Added
Title Stack-Based Buffer Overflow in Zyxel GS1900 Switch Firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Zyxel
Zyxel gs1900-10hp Firmware
Zyxel gs1900-16 Firmware
Zyxel gs1900-24 Firmware
Zyxel gs1900-24e Firmware
Zyxel gs1900-24ep Firmware
Zyxel gs1900-24hpv2 Firmware
Zyxel gs1900-48 Firmware
Zyxel gs1900-48hpv2 Firmware
Zyxel gs1900-8 Firmware
Zyxel gs1900-8hp Firmware
Vendors & Products Zyxel
Zyxel gs1900-10hp Firmware
Zyxel gs1900-16 Firmware
Zyxel gs1900-24 Firmware
Zyxel gs1900-24e Firmware
Zyxel gs1900-24ep Firmware
Zyxel gs1900-24hpv2 Firmware
Zyxel gs1900-48 Firmware
Zyxel gs1900-48hpv2 Firmware
Zyxel gs1900-8 Firmware
Zyxel gs1900-8hp Firmware
Type Values Removed Values Added
Description 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.
Weaknesses CWE-121
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}