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CVE-2026-11834

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 e
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:da5ef4852219f905ec69507d0759077238073a68bf40c12679fad0541976b39a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"defaultStatus":"unaffected","product":"TL-MR6400 v7","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.7.0 Build 260413","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/6

{"defaultStatus":"unaffected","product":"Archer C20 v6","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"V6_260608","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/5

{"defaultStatus":"unaffected","product":"Archer C20 v5","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"EU_V5_260317","status":"affected","version":"0","versionType":"custom"},{"lessThan":"US_V5_260419","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/4

{"defaultStatus":"unaffected","product":"Archer MR200 v07","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.3.0 Build 250605","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"Archer MR200 v8","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.5.0 Build 260605","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Archer VR2100 v1","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"EU_V1_260330","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/3

{"defaultStatus":"unaffected","product":"Archer MR402 v1","vendor":"TP Link Systems Inc.","versions":[{"lessThan":"1.5.0 Build 260605","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/2

Affected products and versions

7 source assertions
{"defaultStatus":"unaffected","product":"TL-MR6400 v7","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.7.0 Build 260413","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/6
{"defaultStatus":"unaffected","product":"Archer C20 v6","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"V6_260608","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/5
{"defaultStatus":"unaffected","product":"Archer C20 v5","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"EU_V5_260317","status":"affected","version":"0","versionType":"custom"},{"lessThan":"US_V5_260419","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/4
{"defaultStatus":"unaffected","product":"Archer MR200 v07","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.3.0 Build 250605","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"Archer MR200 v8","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"1.5.0 Build 260605","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Archer VR2100 v1","vendor":"TP-Link Systems Inc.","versions":[{"lessThan":"EU_V1_260330","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/3
{"defaultStatus":"unaffected","product":"Archer MR402 v1","vendor":"TP Link Systems Inc.","versions":[{"lessThan":"1.5.0 Build 260605","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":8.7,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-78","description":"CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"url":"https://mattg.systems/posts/cve-2026-11834/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/7
{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/archer-c20/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/0
{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/archer-mr200/#Firmware"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/2
{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/archer-mr402/#Firmware"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/1
{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/archer-vr2100/#Firmware"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/4
{"tags":["patch"],"url":"https://www.tp-link.com/en/support/download/tl-mr6400/v7/#Firmware"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/3
{"tags":["patch"],"url":"https://www.tp-link.com/us/support/download/archer-c20/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/5
{"tags":["vendor-advisory"],"url":"https://www.tp-link.com/us/support/faq/5141/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b4270867abe75b193a655a247978412111edc1b52f313454c001a46c3c9b3465 · sha256:e66f59b7aec7d24f… · /containers/cna/references/6

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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