Exploited. On CISA's list since 2025-09-03.

TP-Link Archer C7(EU) and TL-WR841N/ND(MS) OS Command Injection Vulnerability

CVE-2025-9377 · TP-Link Multiple Routers · Published 2025-08-29

How bad would it be?

8.6 out of 10

CVSS rates it high.

How likely is it to be used?

41%

Estimated chance of exploitation in the next 30 days, higher than 98% of all scored flaws (EPSS, 2026-10-29).

Is it already being used?

Yes

CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 401 days ago (2025-09-24).

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

TP-Link Archer C7(EU) and TL-WR841N/ND(MS) contain an OS command injection vulnerability that exists in the Parental Control page. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

What the flaw is

The authenticated remote command execution (RCE) vulnerability exists in the Parental Control page on TP-Link Archer C7(EU) V2 and TL-WR841N/ND(MS) V9. This issue affects Archer C7(EU) V2: before 241108 and TL-WR841N/ND(MS) V9: before 241108. Both products have reached the status of EOL (end-of-life). It's recommending to purchase the new product to ensure better performance and security. If replacement is not an option in the short term, please use the second reference link to download and install the patch(es).

From the NVD.

Fixes and advisories

www.tp-link.comVendor Advisory

Learn this

Explore this week’s weaknesses and all learning topics

Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.

OS command injection

Input changes a command that the server runs through its operating system.

CWE-78 · CISA KEV; NVD record: f23511db-6c3e-4e32-a477-6aa17d310630

Reading and practice labs · Free account for labs. Basic HTTP knowledge; some labs use Burp Suite.

Explore the labs at PortSwigger Web Security Academy How it is prevented

CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.

On SentryFeed

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Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.