Vulnerability-Lookup

GHSA-J2F5-7FM8-M5Q7

Vulnerability from github – Published: 2026-03-27 00:31 – Updated: 2026-03-31 21:31

Details

The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication. An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key.

Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.

Severity ?

6.8 (Medium)


                  
                    CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

5.1 (Medium)


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

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JSON

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  "affected": [],
  "aliases": [
    "CVE-2026-4346"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-312"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-26T22:16:31Z",
    "severity": "MODERATE"
  },
  "details": "The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device\u2019s flash memory while the serial interface remains enabled and protected by weak authentication.  An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router\u2019s management password and wireless network key.\n\nSuccessful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.",
  "id": "GHSA-j2f5-7fm8-m5q7",
  "modified": "2026-03-31T21:31:14Z",
  "published": "2026-03-27T00:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4346"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/in/support/download/tl-wr850n/#Firmware"
    },
    {
      "type": "WEB",
      "url": "https://www.tp-link.com/us/support/faq/5034"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/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-2026-4346 (GCVE-0-2026-4346)

Vulnerability from cvelistv5 – Published: 2026-03-26 21:16 – Updated: 2026-03-27 19:39

Title

Cleartext Storage of Administrative and Wi-Fi Credentials via Accessible Serial Interface in TP Link's TL-WR850N

Summary

Severity ?

5.1 (Medium)


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

CWE

CWE-312 - Cleartext storage of sensitive information

Assigner

TPLink

References

URL

Tags

	https://www.tp-link.com/in/support/download/tl-wr…	patch
	https://www.tp-link.com/us/support/faq/5034/	vendor-advisory

Impacted products

	Vendor	Product	Version
	TP-Link Systems Inc.	TL-WR850N v3	Affected: 0 , < V3_0.9.1 Build251205 (custom)

Credits

Anirudh Tarikere Shankarappa

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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                "id": "CVE-2026-4346",
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-27T19:28:00.222478Z",
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Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-J2F5-7FM8-M5Q7

CVE-2026-4346 (GCVE-0-2026-4346)

Tags

Sightings

Nomenclature