CVE-2025-26326
📋 TL;DR
This vulnerability allows remote attackers to gain complete control of systems running vulnerable NVDA Remote add-ons by guessing weak passwords. The add-ons lack proper authentication mechanisms, making brute-force attacks effective. Users of NVDA Remote 2.6.4 and Tele NVDA Remote 2025.3.3 are affected.
💻 Affected Systems
- NVDA Remote
- Tele NVDA Remote
⚠️ 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
Full system compromise allowing remote code execution, data theft, and complete control of the victim's computer.
Likely Case
Unauthorized access leading to data exfiltration, malware installation, or system manipulation.
If Mitigated
Limited to failed authentication attempts if strong passwords and network controls are implemented.
🎯 Exploit Status
Exploitation requires password guessing/brute-force but is made easier by common weak passwords. No authentication bypass needed beyond password entry.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVDA Remote and Tele NVDA Remote repositories for updates
Vendor Advisory: https://github.com/NVDARemote/NVDARemote
Restart Required: No
Instructions:
1. Update NVDA Remote add-on via NVDA Add-on Manager or download latest from official repository. 2. Update Tele NVDA Remote from its GitHub repository. 3. Verify version after update.
🔧 Temporary Workarounds
Enforce Strong Password Policy
allImplement and require complex passwords (12+ characters, mixed case, numbers, symbols) for all remote connections.
Disable Remote Access When Not Needed
allTurn off NVDA Remote/Tele NVDA Remote when not actively using remote assistance features.
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using these add-ons from untrusted networks
- Enable logging and monitoring for failed authentication attempts and unusual remote connections
🔍 How to Verify
Check if Vulnerable:
Check NVDA add-on manager for installed version of NVDA Remote (should be 2.6.4) or Tele NVDA Remote (should be 2025.3.3).Check Version:
In NVDA, go to Tools > Manage Add-ons and check version of NVDA Remote/Tele NVDA RemoteVerify Fix Applied:
Confirm updated version is installed and test remote connection with strong password.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from single IP
- Successful remote connections from unfamiliar IPs
Network Indicators:
- Unexpected connections to NVDA Remote default ports (6837 TCP)
- Brute-force patterns in authentication traffic
SIEM Query:
source_ip=* AND (event_type="authentication_failure" AND application="NVDA Remote") count>10 within 5m