CVE-2026-75616

Command Injection in Router Web Management Interface

MEDIUM

6.8

CVSS Score

Published: August 19, 2026 at 08:44 PM UTC

Updated: September 8, 2026 at 09:29 PM UTC

2 products affected across 1 vendorArcher C20 FirmwareArcher C20

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Severity

MEDIUM6.8

Exploit prediction

EPSS 3%

SSVC

No known exploit

Description

An OS command injection vulnerability exists in the web management interface of Archer C20 v6 firmware when processing certain WAN-related configuration operations. An authenticated administrator may exploit insufficient input validation to execute arbitrary system commands, potentially resulting in full device compromise. Successful exploitation may allow arbitrary command execution with elevated privileges, compromising the confidentiality, integrity, and availability of the affected device and network traffic passing through it.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Archer C20 Firmware · TP-Link

95%

v < 0.9.1

Affected range stops below 0.9.1, so it looks safe — our inference, not a vendor statement

Archer C20 · TP-Link

90%

v < 0.9.1v < EU_0.9.1 Build 260811v < RU_0.9.1 Build 260812v < US_0.9.1 Build 260812

Affected range stops below 0.9.1, so it looks safe — our inference, not a vendor statement

Affected range stops below EU_0.9.1 Build 260811, so it looks safe — our inference, not a vendor statement

Affected range stops below RU_0.9.1 Build 260812, so it looks safe — our inference, not a vendor statement

Affected range stops below US_0.9.1 Build 260812, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

PatchProduct

Source: cverecord

https://www.tp-link.com/us/support/download/archer-c20/v6.46/#Firmware

PatchProduct

Source: cverecord

https://www.tp-link.com/en/support/download/archer-c20/v6/#Firmware

Vendor Advisory

Source: cverecord

https://www.tp-link.com/en/support/faq/5252/

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUM[email protected]

Attack Vector: ADJACENT_NETWORK
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-78

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