CVE-2026-11834
Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers
No known exploitation. EPSS puts it in the 52nd percentile. Fixed versions are out.
No public exploit knownFix5 products5 fixed builds listed below
No ready-made check. Neither Nuclei nor OpenVAS has one for this CVE yet.
What to do
Find your product and version, then upgrade to the build on the right.
- TP-Link Systems Inc. Archer MR200 v07Affected: < 1.3.0 Build 250605Upgrade to: 1.3.0 Build 250605Stated by: CVE record
- TP-Link Systems Inc. Archer MR200 v8Affected: < 1.5.0 Build 260605Upgrade to: 1.5.0 Build 260605Stated by: CVE record
- TP Link Systems Inc. Archer MR402 v1Affected: < 1.5.0 Build 260605Upgrade to: 1.5.0 Build 260605Stated by: CVE record
- TP-Link Systems Inc. Archer VR2100 v1Affected: < EU_V1_260330Upgrade to: EU_V1_260330Stated by: CVE record
- TP-Link Systems Inc. Archer C20 v5Affected: < EU_V5_260317Upgrade to: EU_V5_260317Affected: < US_V5_260419Upgrade to: US_V5_260419Stated by: CVE record
Versions as the sources state them. 2 more products have version data. Full version matrix after sign-in
What it is
From the CVE record
A command injection vulnerability has been identified in the DHCP option processing logic in multiple TP-Link router models, due to insufficient validation of externally supplied DHCP option data. An adjacent attacker may exploit this vulnerability by supplying crafted DHCP responses, potentially resulting in unauthorized command execution during device initialization or provisioning workflows. This typically occurs when the device is in a factory-default or unconfigured state. Successful exploitation may allow an adjacent, unauthenticated attacker to execute arbitrary commands with elevated privileges, potentially leading to full compromise of the affected device and unauthorized administrative control.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.7% chance of exploitation activity in the next 30 days, which ranks it in the 52nd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
4 events over 4 days, from the signal feeds we watch.
- Record updated
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- mattg.systems/posts/cve-2026-11834/
- tp-link.com/en/support/download/archer-c20/
- tp-link.com/en/support/download/archer-mr200/
And 5 more references. See all after sign-in
In the news
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