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The vulnerability CVE-2025-14134 is a stack-based buffer overflow within the `mod_form.so` library of multiple Linksys wireless range extender models. The flaw resides in the `RE2000v2Repeater_get_wireless_clientlist_setClientsName` function, which handles the naming of connected wireless clients. This function fails to perform proper bounds checking on the user-controlled `clientsname_0` input argument. When an attacker supplies a string longer than the allocated stack buffer, adjacent memory is overwritten. This corruption can alter the function’s return address or other critical control data stored on the stack. As the attack can be launched remotely over the network by an authenticated attacker with low privileges, it poses a significant risk. Successful exploitation typically allows for arbitrary code execution, giving the attacker complete control over the vulnerable device. The exploit has been publicly disclosed, increasing the likelihood of active attacks.
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Platform: Linksys range extenders
Version: Multiple affected versions
Vulnerability : Stack-based buffer overflow
Severity: High
date: 2025-12-06
Prediction: No patch expected
What Undercode Say:
`curl -s http://[bash]/path/to/form | grep -q “mod_form.so” && echo “Potentially Vulnerable”`
`python3 -c “print(‘A’ 500)” | nc [bash] 80`
`strings ./mod_form.so | grep -i “clientlist”`
How Exploit:
Remote authenticated attackers send a crafted HTTP request containing an overly long `clientsname_0` parameter to the vulnerable function, corrupting the stack to hijack execution flow and deploy payload.
Protection from this CVE
Isolate affected devices.
Disable remote management.
Implement network segmentation.
Monitor for exploit attempts.
No vendor patch available.
Impact:
Complete device compromise.
Unauthorized network access.
Potential lateral movement.
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Sources:
Reported By: nvd.nist.gov
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