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CVE-2026-32291— GL-iNet Comet (GL-RM1) KVM unauthenticated root access via UART serial console

Quick assessment

Affected
GL-iNet Comet KVM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GL-iNet Comet是中国GL-iNet公司的一款便携式多功能网络设备。 GL-iNet Comet存在安全漏洞，该漏洞源于UART串行控制台无需身份验证，可能导致物理访问设备的攻击者连接UART引脚。

CVSS 6.8 · Medium EPSS 0.33% · P26
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I. Basic Information for CVE-2026-32291

Vulnerability Information
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Vulnerability Title
GL-iNet Comet (GL-RM1) KVM unauthenticated root access via UART serial console
Source: CVE Program / CVE List V5
Vulnerability Description
The GL-iNet Comet (GL-RM1) KVM before 1.8.2 does not require authentication on the UART serial console. This attack requires physically opening the device and connecting to the UART pins.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
GL-iNet Comet 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GL-iNet Comet是中国GL-iNet公司的一款便携式多功能网络设备。 GL-iNet Comet存在安全漏洞，该漏洞源于UART串行控制台无需身份验证，可能导致物理访问设备的攻击者连接UART引脚。
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
GL-iNet Comet KVM 0 ~ 1.8.2 -

II. Public POCs for CVE-2026-32291

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III. Intelligence Information for CVE-2026-32291

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Vendor Advisories for CVE-2026-32291 (1)

Security Blog Posts for CVE-2026-32291 (1)

Vendor Pages for CVE-2026-32291 (1)

Same Patch Batch · GL-iNet · 2026-03-17 · 4 CVEs total

CVE-2026-32292 7.5 HIGH GL-iNet Comet (GL-RM1) KVM insufficient login rate-limiting
CVE-2026-32290 4.7 MEDIUM GL-iNet Comet (GL-RM1) KVM insufficient firmware verification
CVE-2026-32293 3.7 LOW GL-iNet Comet (GL-RM1) KVM insufficient certificate validation

IV. Related Vulnerabilities

Same product: Comet KVM
Same vendor: GL-iNet
Same weakness: CWE-306

V. Comments for CVE-2026-32291

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