CVE-2026-7273
Last modified
CVE-2026-7273 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
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.
Metrics
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | Gs1900-8 Firmware | < 2.90\(aahh.2\)c0 |
| Zyxel | Gs1900-8hp Firmware | < 2.90\(aahi.2\)c0 |
| Zyxel | Gs1900-10hp Firmware | < 2.90\(aazi.2\)c0 |
| Zyxel | Gs1900-16 Firmware | < 2.90\(aahj.2\)c0 |
| Zyxel | Gs1900-24 Firmware | < 2.90\(aahl.2\)c0 |
| Zyxel | Gs1900-24e Firmware | < 2.90\(aahk.2\)c0 |
| Zyxel | Gs1900-24ep Firmware | < 2.90\(abto.2\)c0 |
| Zyxel | Gs1900-24hpv2 Firmware | < 2.90\(abtp.2\)c0 |
| Zyxel | Gs1900-48 Firmware | < 2.90\(aahn.2\)c0 |
| Zyxel | Gs1900-48hpv2 Firmware | < 2.90\(abtq.2\)c0 |
References
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-7273Third Party Advisory, US Government Resource
- https://www.greynoise.io/blog/open-season-on-kapibala-attacker-steals-government-records-wordpress-exploitationExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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