Vulnerability-Lookup

GHSA-RMCQ-5353-M59X

Vulnerability from github – Published: 2026-09-28 15:31 – Updated: 2026-09-28 15:31

Details

The Kaon AR2140X router improperly issues session cookies in responses to unauthenticated HTTP requests. This vulnerability allows a remote attacker to obtain a valid session identifier without providing credentials, resulting in an authentication bypass. With this access, the attacker can perform unauthorized actions on upgrade-related functionalities. These actions can be abused to force the router to issue GET requests to arbitrarily chosen domains.

This issue was identified in firmware versions up to 4.2.17. Status of newer versions remains unknown.

Severity

5.3 (Medium)


                  
                    CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-52749"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-28T13:17:22Z",
    "severity": "MODERATE"
  },
  "details": "The Kaon AR2140X router improperly issues session cookies in responses to unauthenticated HTTP requests.\u00a0This vulnerability allows a remote attacker to obtain a valid session identifier without providing credentials, resulting in an authentication bypass. With this access, the attacker can perform unauthorized actions on upgrade-related functionalities. These actions can be abused to force the router to issue GET requests to arbitrarily chosen domains.\n\nThis issue was\u00a0identified in firmware versions up to 4.2.17. Status of newer versions remains unknown.",
  "id": "GHSA-rmcq-5353-m59x",
  "modified": "2026-09-28T15:31:51Z",
  "published": "2026-09-28T15:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52749"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/en/posts/2026/09/CVE-2026-52748"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-52749 (GCVE-0-2026-52749)

Vulnerability from cvelistv5 – Published: 2026-09-28 13:01 – Updated: 2026-09-28 13:31

Title

Improper Authentication in Kaon AR2140X

Summary

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 13:19 UTC

CWE

CWE-287 - Improper Authentication

Assigner

CERT-PL ENISA root

References

1 reference

URL	Tags
https://cert.pl/en/posts/2026/09/CVE-2026-52748

Impacted products

1 product

Vendor	Product	Version
Kaon	AR2140	Affected: 0 , ≤ 4.2.17 (semver) cpe:2.3:a:kaon:ar2140::::::::

Credits

Sebastian Jeż

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JSON

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        "metrics": [
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            "other": {
              "content": {
                "id": "CVE-2026-52749",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T13:19:12.756407Z",
                "version": "2.0.3"
              },
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            }
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        "providerMetadata": {
          "dateUpdated": "2026-09-28T13:31:27.330Z",
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        },
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        }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-RMCQ-5353-M59X

CVE-2026-52749 (GCVE-0-2026-52749)

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