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How CVE-2025-22996 Works
The vulnerability exists in the `spf_table_content` component of the Linksys E5600 Router firmware version 1.1.0.26. Attackers can inject malicious JavaScript or HTML payloads into the `desc` parameter, which is stored in the router’s web interface. When an administrator views the affected page, the payload executes in their browser, leading to session hijacking, credential theft, or router configuration manipulation. The attack persists due to improper input sanitization in the firmware’s web management module.
DailyCVE Form
Platform: Linksys E5600
Version: 1.1.0.26
Vulnerability: Stored XSS
Severity: Critical
Date: 06/11/2025
Prediction: Patch by 08/2025
What Undercode Say:
Exploitation Steps
1. Craft a malicious payload:
<script>alert(document.cookie)</script>
2. Inject via `desc` parameter in HTTP POST request:
curl -X POST -d "desc=<PAYLOAD>" http://router_ip/spf_table_content
Protection Measures
1. Apply input filtering:
function sanitize(input) {
return input.replace(/<script.?>.?<\/script>/gi, '');
}
2. Use CSP headers:
Content-Security-Policy: default-src 'self'; script-src 'unsafe-inline'
Detection Commands
Check for vulnerable firmware:
cat /etc/version | grep "1.1.0.26"
Mitigation Script
Temporary workaround:
iptables -A INPUT -p tcp --dport 80 -m string --string "<script" --algo bm -j DROP
Firmware Analysis
Extract firmware for inspection:
binwalk -Me firmware.bin
Log Monitoring
Detect exploitation attempts:
grep "desc=<script" /var/log/httpd.log
Patch Verification
Post-update check:
openssl dgst -sha256 /tmp/new_firmware.bin
Exploit Impact
- Session cookie theft
- Router config overwrite
- Malware delivery
Debugging
Enable debug logs:
echo 1 > /proc/sys/net/ipv4/tcp_log_debug
References
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
