PatchTheCVECVE-2026-3227: A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due
CVE-2026-3227 is a medium-severity flaw (CVSS 6.8) affecting tl-wr802n firmware, tl-wr841n firmware, tl-wr840n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authenticated attacker to upload a crafted configuration file that results in execution of OS commands with root privileges during port-trigger processing. Successful exploitation allows an authenticated attacker
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.8 (Medium) |
| Attack vector | Adjacent network |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 2.0% (top 19%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2026-03-16 |
| Last modified | 2026-07-01 |
Last updated 2026-07-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-3227?
tl-wr802n firmware: upgrade to 260304; tl-wr841n firmware: upgrade to 260303; tl-wr840n firmware: upgrade to 260304. Exact commands for each OS are on this page.
Is CVE-2026-3227 being exploited?
CVE-2026-3227 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-3227 affect?
CVE-2026-3227 affects tl-wr802n firmware, tl-wr841n firmware, tl-wr840n firmware. Severity is medium (CVSS 6.8). A command injection vulnerability was identified in TP-Link TL-WR802N v4, TL-WR841N v14, and TL-WR840N v6 due to improper neutralization of special elements used in an OS command. In the router configuration import function allows an authe
How urgent is CVE-2026-3227?
Priority 44/100. No elevated risk signals yet.