Is CVE-2026-3227 in the CISA KEV catalog?

No. CVE-2026-3227 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-3227?

CVE-2026-3227 has a CVSS v3 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2026-3227?

CVE-2026-3227 has an EPSS score of 1.10% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-3227?

Upgrade tl-wr802n firmware to 260304 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2026-3227

MEDIUM

6.8

CVSS v3

NVD

Description

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 to execute system commands with root privileges, leading to full device compromise.

CWE-78OS Command Injection

How to fix

Remediation Available

tl-wr802n firmwareNVD

Affected:< 260304Fixed in:260304CVE-2026-3227derived from NVD

tl-wr840n firmwareNVD

Affected:< 260304Fixed in:260304CVE-2026-3227derived from NVD

tl-wr841n firmwareNVD

Affected:< 260303Fixed in:260303CVE-2026-3227derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.10%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory1

tp-link.com

Product5

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-01.