Vulnerability-Lookup

GHSA-WGVC-4M87-RQ27

Vulnerability from github – Published: 2026-01-29 09:31 – Updated: 2026-01-29 09:31

Details

A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.

Severity ?

6.5 (Medium)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23570"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-29T09:16:04Z",
    "severity": "MODERATE"
  },
  "details": "A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.",
  "id": "GHSA-wgvc-4m87-rq27",
  "modified": "2026-01-29T09:31:50Z",
  "published": "2026-01-29T09:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23570"
    },
    {
      "type": "WEB",
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23570 (GCVE-0-2026-23570)

Vulnerability from cvelistv5 – Published: 2026-01-29 08:50 – Updated: 2026-01-29 15:45

Title

Log timestamp tampering vulnerability in Content Distribution Service

Summary

Severity ?

6.5 (Medium)


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

CWE

CWE-20 - Improper Input Validation

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

Threat Hunt Team of Bank of America

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23570",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-29T15:41:12.827915Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "modules": [
            "Content Distribution Service",
            "NomadBranch.exe"
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          "platforms": [
            "Windows"
          ],
          "product": "DEX",
          "vendor": "TeamViewer",
          "versions": [
            {
              "lessThan": "26.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
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          "type": "finder",
          "value": "Threat Hunt Team of Bank of America"
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            }
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        }
      ],
      "impacts": [
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      "metrics": [
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            "attackVector": "ADJACENT_NETWORK",
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            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
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          "scenarios": [
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        "orgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
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      "references": [
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          "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/"
        }
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        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Log timestamp tampering vulnerability in Content Distribution Service",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
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  "cveMetadata": {
    "assignerOrgId": "13430f76-86eb-43b2-a71c-82c956ef31b6",
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    "datePublished": "2026-01-29T08:50:52.882Z",
    "dateReserved": "2026-01-14T13:54:40.322Z",
    "dateUpdated": "2026-01-29T15:45:56.209Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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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-WGVC-4M87-RQ27

CVE-2026-23570 (GCVE-0-2026-23570)

Tags

Sightings

Nomenclature