Secret disclosure via static Router.cfg XOR key
Published Jul 30, 2026 · Updated Jul 30, 2026
Weak encryption in CSL 1010 M2M 3G WiFi Module firmware 2.2.1.4 and earlier allows attackers to read stored secrets from Router.cfg. Router.cfg is obfuscated with a static single-byte XOR key rather than encryption, so reversing the cipher exposes every stored value in plaintext. Local access to the backup file is required; disclosure is limited to stored administrative, network, carrier, and SIM credentials.
Summary
What happened
Weak encryption in CSL 1010 M2M 3G WiFi Module firmware 2.2.1.4 and earlier allows attackers to read stored secrets from Router.cfg. Router.cfg is obfuscated with a static single-byte XOR key rather than encryption, so reversing the cipher exposes every stored value in plaintext. Local access to the backup file is required; disclosure is limited to stored administrative, network, carrier, and SIM credentials.
The record
- CVE
- CVE-2026-67596
- Published
- Jul 30, 2026
- Updated
- Jul 30, 2026
- Vendor
- CSL Mobile Limited
- Product
- CSL 1010 M2M 3G WiFi Module
- Classifications
- CWE-261, T1552.001
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 30, 2026CVE publishedPublication date reported by the CVE source.
- Jul 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.2.1.4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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