Vulnerability-Lookup

FKIE_CVE-2026-23563

Vulnerability from fkie_nvd - Published: 2026-01-29 09:16 - Updated: 2026-01-29 16:31

Severity ?

5.7 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H

Summary

Improper Link Resolution Before File Access (invoked by 1E‑Explorer‑TachyonCore‑DeleteFileByPath instruction) in TeamViewer DEX - 1E Client before version 26.1 on Windows allows a low‑privileged local attacker to delete protected system files via a crafted RPC control junction or symlink that is followed when the delete instruction executes.

References

	URL	Tags
	psirt@teamviewer.com	https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1002/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Link Resolution Before File Access (invoked by 1E\u2011Explorer\u2011TachyonCore\u2011DeleteFileByPath instruction) in TeamViewer DEX - 1E Client before version 26.1 on Windows allows a low\u2011privileged local attacker to delete protected system files via a crafted RPC control junction or symlink that is followed when the delete instruction executes."
    }
  ],
  "id": "CVE-2026-23563",
  "lastModified": "2026-01-29T16:31:00.867",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 5.2,
        "source": "psirt@teamviewer.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-29T09:16:03.793",
  "references": [
    {
      "source": "psirt@teamviewer.com",
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1002/"
    }
  ],
  "sourceIdentifier": "psirt@teamviewer.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        }
      ],
      "source": "psirt@teamviewer.com",
      "type": "Secondary"
    }
  ]
}

CVE-2026-23563 (GCVE-0-2026-23563)

Vulnerability from cvelistv5 – Published: 2026-01-29 08:39 – Updated: 2026-01-29 16:53

Title

Privilege escalation in TeamViewer DEX via DeleteFileByPath instruction

Summary

Severity ?

5.7 (Medium)


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

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

References

URL

Tags

https://www.teamviewer.com/en/resources/trust-cen…

Impacted products

	Vendor	Product	Version
	TeamViewer	DEX	Affected: 0 , < 26.1 (custom)

Credits

Lockheed Martin Red Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23563",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-29T15:57:26.896440Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-29T16:53:26.845Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "1E Client"
          ],
          "platforms": [
            "Windows"
          ],
          "product": "DEX",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "26.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Lockheed Martin Red Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Improper Link Resolution Before File Access (invoked by 1E\u2011Explorer\u2011TachyonCore\u2011DeleteFileByPath instruction) in TeamViewer DEX - 1E Client before version 26.1 on Windows allows a low\u2011privileged local attacker to delete protected system files via a crafted RPC control junction or symlink that is followed when the delete instruction executes."
            }
          ],
          "value": "Improper Link Resolution Before File Access (invoked by 1E\u2011Explorer\u2011TachyonCore\u2011DeleteFileByPath instruction) in TeamViewer DEX - 1E Client before version 26.1 on Windows allows a low\u2011privileged local attacker to delete protected system files via a crafted RPC control junction or symlink that is followed when the delete instruction executes."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-132",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-132 Symlink Attack"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-29T08:39:56.105Z",
        "orgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
        "shortName": "TV"
      },
      "references": [
        {
          "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1002/"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Update the TeamViewer DEX Client (1E Client) to the latest available version."
            }
          ],
          "value": "Update the TeamViewer DEX Client (1E Client) to the latest available version."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Privilege escalation in TeamViewer DEX via DeleteFileByPath instruction",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
    "assignerShortName": "TV",
    "cveId": "CVE-2026-23563",
    "datePublished": "2026-01-29T08:39:56.105Z",
    "dateReserved": "2026-01-14T13:54:40.321Z",
    "dateUpdated": "2026-01-29T16:53:26.845Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

FKIE_CVE-2026-23563

CVE-2026-23563 (GCVE-0-2026-23563)

Tags

Sightings

Nomenclature