CVE-2026-7273

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Summary

CVECVE-2026-7273
StatePUBLISHED
AssignerZyxel
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-16 03:16:13 UTC
Updated2026-06-18 04:17:09 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002770000 probability, percentile 0.192220000 (date 2026-06-22)

Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based buffer overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zyxel GS1900-48HPv2 Firmware affected <= 2.90(ABTQ.1)C0 Not specified
CNA Zyxel GS1900-8 Firmware affected <= 2.90(AAHH.1)C0 Not specified
CNA Zyxel GS1900-8HP Firmware affected <= 2.90(AAHI.1)C0 Not specified
CNA Zyxel GS1900-10HP Firmware affected <= 2.90(AAZI.1)C0 Not specified
CNA Zyxel GS1900-16 Firmware affected <= 2.90(AAHJ.1)C0 Not specified
CNA Zyxel GS1900-24 Firmware affected <= 2.90(AAHL.1)C0 Not specified
CNA Zyxel GS1900-24E Firmware affected <= 2.90(AAHK.1)C0 Not specified
CNA Zyxel GS1900-24EP Firmware affected <= 2.90(ABTO.1)C0 Not specified
CNA Zyxel GS1900-24HPv2 Firmware affected <= 2.90(ABTP.1)C0 Not specified
CNA Zyxel GS1900-48 Firmware affected <= 2.90(AAHN.1)C0 Not specified

References

ReferenceSourceLinkTags
www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory... [email protected] www.zyxel.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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