CVE-2026-7273

high · 8.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Added 2026-09-21Remediation due 2026-09-24

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.

8.8

CVSS

0.3%

EPSS (exploit prob.)

25th

EPSS percentile

2026-06-16

Published

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

Weaknesses

CWE-121

Affected products

Vendor	Product	Affected versions
zyxel	gs1900-8_firmware	< 2.90\(aahh.2\)c0
zyxel	gs1900-8	all versions
zyxel	gs1900-8hp_firmware	< 2.90\(aahi.2\)c0
zyxel	gs1900-8hp	all versions
zyxel	gs1900-10hp_firmware	< 2.90\(aazi.2\)c0
zyxel	gs1900-10hp	all versions
zyxel	gs1900-16_firmware	< 2.90\(aahj.2\)c0
zyxel	gs1900-16	all versions
zyxel	gs1900-24_firmware	< 2.90\(aahl.2\)c0
zyxel	gs1900-24	all versions
zyxel	gs1900-24e_firmware	< 2.90\(aahk.2\)c0
zyxel	gs1900-24e	all versions
zyxel	gs1900-24ep_firmware	< 2.90\(abto.2\)c0
zyxel	gs1900-24ep	all versions
zyxel	gs1900-24hpv2_firmware	< 2.90\(abtp.2\)c0
zyxel	gs1900-24hpv2	all versions
zyxel	gs1900-48_firmware	< 2.90\(aahn.2\)c0
zyxel	gs1900-48	all versions
zyxel	gs1900-48hpv2_firmware	< 2.90\(abtq.2\)c0
zyxel	gs1900-48hpv2	all versions

Check a specific version with /api/v1/cve/match.

References

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-7273