# CVE-2026-67596

## Summary

- **CVE ID:** CVE-2026-67596
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-261
- **Published:** Jul 30, 2026
- **Last Modified:** Jul 31, 2026

## 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 with a static key applied to 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.

## Affected Products

- CSL Mobile Limited — CSL 1010 M2M 3G WiFi Module (0)

## References

- [CNA](https://www.zeroscience.mk/#/advisories/ZSL-2026-6000)
- [CNA](https://1010.com.hk/)
- [CNA](https://www.vulncheck.com/advisories/csl-1010-m2m-3g-wifi-module-weak-encryption-via-router-cfg)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._