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CVE-2026-91191— Lantronix G520 加密签名验证不当漏洞

一分钟漏洞结论

影响对象
Lantronix G520 Series
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

The device's update mechanism includes conditions that allow unauthorized software packages to be accepted as authentic. During the boot process, the stock done function disables signature verification in the OPKG configuration before restoring optional packag

CVSS 7.5 · High
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一、 漏洞 CVE-2026-91191 基础信息

漏洞信息

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Vulnerability Title
Lantronix G520 Series Cellular Gateway Improper Verification of Cryptographic Signature
来源: CVE Program / CVE List V5
Vulnerability Description
The device's update mechanism includes conditions that allow unauthorized software packages to be accepted as authentic. During the boot process, the stock done function disables signature verification in the OPKG configuration before restoring optional packages from a writable, unsigned feed. Separately, the publicly distributed SDK contains the production private key whose corresponding public key is trusted by both stable and beta firmware builds. Either issue undermines package authenticity, and together they allow an attacker to provide packages that appear valid to the system. Even if signature enforcement is restored, the exposed production key enables an attacker to generate signatures that the device will continue to trust. An attacker who can supply a malicious package may be able to execute arbitrary code with root privileges during installation.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
Lantronix G520 Series 2.6.0.4R6 stable -

二、漏洞 CVE-2026-91191 的公开POC

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三、漏洞 CVE-2026-91191 的情报信息

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CVE-2026-91191 其他参考 (4)

IV. Related Vulnerabilities

Same product: G520 Series
Same vendor: Lantronix
Same weakness: CWE-347

V. Comments for CVE-2026-91191

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