CVE-2026-67596 CSL 1010 M2M 3G WiFi Module 2.2.1.4 Weak Encryption via Router.cfg
Attackers can decrypt configuration backups using a weak XOR cipher to expose sensitive credentials and SIM identifiers on CSL 3G WiFi modules.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-67596?
CVE-2026-67596 is a medium-severity vulnerability in CSL 1010 M2M 3G WiFi Module, published on 30 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-261
Which versions are affected by CVE-2026-67596?
How do I fix CVE-2026-67596?
No fix has been published for CVE-2026-67596 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-67596 being exploited?
There is no known exploitation of CVE-2026-67596 in the wild and no public exploit code.
Sources
Also known as GHSA-fvx5-jmmg-89rf.