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CVE-2026-67596— CSL 1010 M2M 3G WiFi Module 2.2.1.4 Weak Encryption via Router.cfg

Quick assessment

Affected
CSL Mobile Limited CSL 1010 M2M 3G WiFi Module
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.

CSL CSL 1010 M2M 3G WiFi Module是中国CSL公司开源的一款集成3G与WiFi的M2M通信模块。 CSL 1010 M2M 3G WiFi Module 2.2.1.4及之前版本存在信任管理问题漏洞，该漏洞源于使用了单字节XOR密码和静态密钥对Router.cfg配置文件备份进行加密，导致未经身份验证的攻击者可以恢复所有存储的秘密，包括Web管理密码、telnet密码、WPA/WPA2预共享密钥等。

CVSS 6.2 · Medium EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
CSL Mobile Limited CSL 1010 M2M 3G WiFi Module ≤ 2.2.1.4 affected
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I. Basic Information for CVE-2026-67596

Vulnerability Information
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Vulnerability Title
CSL 1010 M2M 3G WiFi Module 2.2.1.4 Weak Encryption via Router.cfg
Source: CVE Program / CVE List V5
Vulnerability Description
CSL 1010 M2M 3G WiFi Module firmware through 2.2.1.4 contains a weak encryption vulnerability that allows unauthenticated attackers to recover all stored secrets in plaintext by reversing a single-byte XOR cipher that uses a static key to obfuscate the configuration backup file. Attackers can trivially decrypt the Router.cfg backup file to expose web administration and telnet passwords, WPA/WPA2 pre-shared keys, PPPoE and 3G/APN credentials, and SIM identifiers including IMSI and IMEI.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
口令使用弱密码学算法
Source: CVE Program / CVE List V5
Vulnerability Title
CSL 1010 M2M 3G WiFi Module 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CSL CSL 1010 M2M 3G WiFi Module是中国CSL公司开源的一款集成3G与WiFi的M2M通信模块。 CSL 1010 M2M 3G WiFi Module 2.2.1.4及之前版本存在信任管理问题漏洞，该漏洞源于使用了单字节XOR密码和静态密钥对Router.cfg配置文件备份进行加密，导致未经身份验证的攻击者可以恢复所有存储的秘密，包括Web管理密码、telnet密码、WPA/WPA2预共享密钥等。
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
CSL Mobile Limited CSL 1010 M2M 3G WiFi Module 0 ~ 2.2.1.4 -

II. Public POCs for CVE-2026-67596

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III. Intelligence Information for CVE-2026-67596

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Vendor Advisories for CVE-2026-67596 (2)

Other References for CVE-2026-67596 (1)

IV. Related Vulnerabilities

Same weakness: CWE-261

V. Comments for CVE-2026-67596

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