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Known exploited · TP-Link

CVE-2025-9377: TP-Link Archer C7(EU) and TL-WR841N/ND(MS) OS Command Injection Vulnerability

What it is

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.

Added September 3, 2025Due September 24, 2025CISA KEV catalog 2026.10.01

Vendor
TP-Link
Product
Multiple Routers
Added to KEV
September 3, 2025
CISA due date
September 24, 2025
Ransomware use
Unknown

What CISA requires

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

Forensic triage

No

What to do now

  1. Find every instance of Multiple Routers you run, including the forgotten ones, and check its version against the vendor advisory.
  2. Apply the vendor's fix or mitigation, before September 24, 2025 if you are bound by CISA's deadline, sooner if it faces the internet.
  3. Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
  4. Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops OS command injection payloads, including Shellshock.

References

CVE-2025-9377 in the National Vulnerability Database

The Dome

Block it at the edge while you patch

The Dome's WAF runs the OWASP Core Rule Set in blocking mode and stops OS command injection payloads, including Shellshock before they reach your application.

See the Dome

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Train the engineers who fix it

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.