CVE-2025-27558
📋 TL;DR
This vulnerability allows attackers to inject arbitrary frames into mesh Wi-Fi networks using WPA, WPA2, WPA3, or WEP security. It affects devices that support receiving non-SSP A-MSDU frames in mesh network configurations. The issue stems from an incomplete fix for CVE-2020-24588 in the draft IEEE P802.11-REVme standard.
💻 Affected Systems
- Wi-Fi mesh networking equipment implementing IEEE P802.11-REVme D1.1 through D7.0
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete network compromise allowing data interception, man-in-the-middle attacks, and potential credential theft across the entire mesh network.
Likely Case
Selective packet injection enabling traffic manipulation, session hijacking, and network disruption within the attacker's radio range.
If Mitigated
Limited impact to isolated network segments with proper segmentation and monitoring in place.
🎯 Exploit Status
Exploitation requires proximity to target network and knowledge of FragAttacks techniques. The vulnerability is related to previously documented FragAttacks research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet available
Vendor Advisory: https://github.com/vanhoefm/fragattacks-survey-public/blob/main/README.md
Restart Required: No
Instructions:
1. Monitor vendor security advisories for firmware updates. 2. Apply patches when available from Wi-Fi chipset and device manufacturers. 3. The fix will require updates to the 802.11 standard implementation.
🔧 Temporary Workarounds
Disable mesh networking
allConvert mesh networks to traditional access point configurations where possible
Enable client isolation
allPrevent direct client-to-client communication within the mesh network
🧯 If You Can't Patch
- Segment mesh networks from critical infrastructure using VLANs or physical separation
- Implement network monitoring for unusual frame injection patterns and deploy intrusion detection systems
🔍 How to Verify
Check if Vulnerable:
Check if your Wi-Fi equipment implements IEEE P802.11-REVme D1.1 through D7.0 and supports mesh networking with non-SSP A-MSDU framesCheck Version:
Check device firmware version via vendor-specific commands or web interfaceVerify Fix Applied:
Verify with vendors that firmware updates address CVE-2025-27558 specifically📡 Detection & Monitoring
Log Indicators:
- Unusual frame injection patterns
- A-MSDU frame anomalies in Wi-Fi logs
Network Indicators:
- Unexpected frame sequences in mesh network traffic
- Protocol violations in 802.11 communications
SIEM Query:
Search for Wi-Fi driver/firmware alerts related to frame injection or FragAttacks patterns