Vulnerability in Zyxel GS1900 48HPv2 Firmware
CVSS score
8.8
EPSS probability
%2.5
Risk score
0.4
Published
4 mo ago
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.
Impact on My Inventory
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-7273 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-7273 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | zyxel | GS1900-48HPv2 firmware | View |
| 2 | zyxel | GS1900-8 firmware | View |
| 3 | zyxel | GS1900-8HP firmware | View |
| 4 | zyxel | GS1900-10HP firmware | View |
| 5 | zyxel | GS1900-16 firmware | View |
| 6 | zyxel | GS1900-24 firmware | View |
| 7 | zyxel | GS1900-24E firmware | View |
| 8 | zyxel | GS1900-24EP firmware | View |
| 9 | zyxel | GS1900-24HPv2 firmware | View |
| 10 | zyxel | GS1900-48 firmware | View |
| 11 | zyxel | GS1900-8 firmware | View |
| 12 | zyxel | gs1900-8 | View |
| 13 | zyxel | GS1900-8HP firmware | View |
| 14 | zyxel | gs1900-8hp | View |
| 15 | zyxel | GS1900-10HP firmware | View |
| 16 | zyxel | gs1900-10hp | View |
| 17 | zyxel | GS1900-16 firmware | View |
| 18 | zyxel | gs1900-16 | View |
| 19 | zyxel | GS1900-24 firmware | View |
| 20 | zyxel | gs1900-24 | View |
| 21 | zyxel | GS1900-24E firmware | View |
| 22 | zyxel | gs1900-24e | View |
| 23 | zyxel | GS1900-24EP firmware | View |
| 24 | zyxel | gs1900-24ep | View |
| 25 | zyxel | GS1900-24HPv2 firmware | View |
| 26 | zyxel | gs1900-24hpv2 | View |
| 27 | zyxel | GS1900-48 firmware | View |
| 28 | zyxel | gs1900-48 | View |
| 29 | zyxel | GS1900-48HPv2 firmware | View |
| 30 | zyxel | gs1900-48hpv2 | View |
| 31 | zyxel | GS1900 Series Switches | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.8 | CVSS V3_1 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CVE CNA |
| 8.8 | CVSS V31 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
Resmî yama doğrulanamadı; geçici azaltım veya workaround mevcut.
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.
Public exploit and active exploitation status
Verified exploit intelligence
CVE-2026-7273 : the database holds 1 public PoC/exploit sources for it. For direct links to the sources, open the Public Exploits tab.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-7273 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-7273 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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