How severe is CVE-2026-3227?

CVE-2026-3227 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-3227 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3227?

CVE-2026-3227 primarily affects Tp-link Tl-wr802n Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-3227?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3227 have an EU (EUVD) identifier?

Yes. CVE-2026-3227 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12171.

When was CVE-2026-3227 published?

CVE-2026-3227 was published on 2026-03-16 and last updated on 2026-07-01.

CVE-2026-3227

CVE-2026-3227 is a medium-severity vulnerability in Tp-link Tl-wr802n Firmware with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v4: 8.5
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12171
Weakness: CWE-78
Affected product: Tp-link Tl-wr802n Firmware
Published: 2026-03-16
Last modified: 2026-07-01

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.

Frequently asked questions

What is CVE-2026-3227?: 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.
How severe is CVE-2026-3227?: CVE-2026-3227 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-3227 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3227?: CVE-2026-3227 primarily affects Tp-link Tl-wr802n Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-3227?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3227 have an EU (EUVD) identifier?: Yes. CVE-2026-3227 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12171.
When was CVE-2026-3227 published?: CVE-2026-3227 was published on 2026-03-16 and last updated on 2026-07-01.

References

Affected products (3)

cpe:2.3:o:tp-link:tl-wr802n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr841n_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr840n_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Tl-wr802n Firmware

CVE-2023-36489 — High (CVSS 8.8): Multiple TP-LINK products allow a network-adjacent unauthenticated attacker to execute arbitrary OS commands. Affected…
CVE-2021-4144 — High (CVSS 8.8): TP-Link wifi router TL-WR802N V4(JP), with firmware version prior to 211202, is vulnerable to OS command injection.
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CVE-2021-3275 — Medium (CVSS 6.1): Unauthenticated stored cross-site scripting (XSS) exists in multiple TP-Link products including WIFI Routers (Wireless…

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