CVE-2026-7273
Quick assessment
Affected
Zyxel GS1900-48HPv2 firmware
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Zyxel gs1900-48hpv2 firmware是中国Zyxel公司的一套网络交换机固件。 Zyxel GS1900-48HPv2 firmware存在缓冲区错误漏洞，该漏洞源于CGI程序存在栈缓冲区溢出，可能导致基于局域网的未经验证攻击者通过特制HTTP请求执行OS命令。
In-the-Wild Activity Observed
cisa_kev · confirmed
Possible ATT&CK Techniques 3 AI
T1210 · Exploitation of Remote Services T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Zyxel | GS1900-10HP firmware | <= 2.90(AAZI.1)C0 |
affected |
| Zyxel | GS1900-16 firmware | <= 2.90(AAHJ.1)C0 |
affected |
| Zyxel | GS1900-24 firmware | <= 2.90(AAHL.1)C0 |
affected |
| Zyxel | GS1900-24E firmware | <= 2.90(AAHK.1)C0 |
affected |
| Zyxel | GS1900-24EP firmware | <= 2.90(ABTO.1)C0 |
affected |
| Zyxel | GS1900-24HPv2 firmware | <= 2.90(ABTP.1)C0 |
affected |
| Zyxel | GS1900-48 firmware | <= 2.90(AAHN.1)C0 |
affected |
| Zyxel | GS1900-48HPv2 firmware | <= 2.90(ABTQ.1)C0 |
affected |
| Zyxel | GS1900-8 firmware | <= 2.90(AAHH.1)C0 |
affected |
| Zyxel | GS1900-8HP firmware | <= 2.90(AAHI.1)C0 |
affected |
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I. Basic Information for CVE-2026-7273
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel GS1900-48HPv2 firmware 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel gs1900-48hpv2 firmware是中国Zyxel公司的一套网络交换机固件。 Zyxel GS1900-48HPv2 firmware存在缓冲区错误漏洞，该漏洞源于CGI程序存在栈缓冲区溢出，可能导致基于局域网的未经验证攻击者通过特制HTTP请求执行OS命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Zyxel | GS1900-48HPv2 firmware | <= 2.90(ABTQ.1)C0 | - |
|
| Zyxel | GS1900-8 firmware | <= 2.90(AAHH.1)C0 | - |
|
| Zyxel | GS1900-8HP firmware | <= 2.90(AAHI.1)C0 | - |
|
| Zyxel | GS1900-10HP firmware | <= 2.90(AAZI.1)C0 | - |
|
| Zyxel | GS1900-16 firmware | <= 2.90(AAHJ.1)C0 | - |
|
| Zyxel | GS1900-24 firmware | <= 2.90(AAHL.1)C0 | - |
|
| Zyxel | GS1900-24E firmware | <= 2.90(AAHK.1)C0 | - |
|
| Zyxel | GS1900-24EP firmware | <= 2.90(ABTO.1)C0 | - |
|
| Zyxel | GS1900-24HPv2 firmware | <= 2.90(ABTP.1)C0 | - |
|
| Zyxel | GS1900-48 firmware | <= 2.90(AAHN.1)C0 | - |
|
II. Public POCs for CVE-2026-7273
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-7273 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-7273
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