Vulnerability-Lookup

CVE-2026-3564 (GCVE-0-2026-3564)

Vulnerability from cvelistv5 – Published: 2026-03-17 14:48 – Updated: 2026-07-09 17:20

Title

ScreenConnect Instance Level Cryptographic Material Exposure

Summary

A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConnect host and guest client agents are not independently affected by this CVE.

Severity

9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

ConnectWise

References

1 reference

URL	Tags
https://www.connectwise.com/company/trust/securit…

Impacted products

1 product

Vendor	Product	Version
ConnectWise	ScreenConnect	Affected: All server versions prior to 26.1

Show details on NVD website

JSON

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FKIE_CVE-2026-3564

Vulnerability from fkie_nvd - Published: 2026-03-17 15:16 - Updated: 2026-07-09 18:16

Severity

9.0 (Critical) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	7d616e1a-3288-43b1-a0dd-0a65d3e70a49	https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Server component",
            "Server authentication cryptographic material handling"
          ],
          "product": "ScreenConnect",
          "vendor": "ConnectWise",
          "versions": [
            {
              "status": "affected",
              "version": "All server versions prior to 26.1"
            }
          ]
        }
      ],
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49"
    }
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  "cveTags": [],
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    },
    {
      "lang": "es",
      "value": "Una condici\u00f3n en ScreenConnect podr\u00eda permitir a un actor con acceso a material criptogr\u00e1fico a nivel de servidor utilizado para la autenticaci\u00f3n obtener acceso no autorizado, incluyendo privilegios elevados, en ciertos escenarios."
    }
  ],
  "id": "CVE-2026-3564",
  "lastModified": "2026-07-09T18:16:51.930",
  "metrics": {
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      {
        "cvssData": {
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          "availabilityImpact": "HIGH",
          "baseScore": 9.0,
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          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 6.0,
        "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
        "type": "Secondary"
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3564",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-17T00:00:00+00:00",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-17T15:16:19.253",
  "references": [
    {
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
    }
  ],
  "sourceIdentifier": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
      "type": "Secondary"
    }
  ]
}

GHSA-HRC2-HCHG-RQ8R

Vulnerability from github – Published: 2026-03-17 15:36 – Updated: 2026-03-17 15:36

Details

A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.

Severity

9.0 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3564"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-17T15:16:19Z",
    "severity": "CRITICAL"
  },
  "details": "A condition in ScreenConnect may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios.",
  "id": "GHSA-hrc2-hchg-rq8r",
  "modified": "2026-03-17T15:36:23Z",
  "published": "2026-03-17T15:36:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3564"
    },
    {
      "type": "WEB",
      "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2026-0763

Vulnerability from csaf_certbund - Published: 2026-03-17 23:00 - Updated: 2026-03-17 23:00

Summary

ConnectWise ScreenConnect: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen und potenziell Privilegieneskalation

Severity

Hoch

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: ConnectWise ScreenConnect ist eine Softwarelösung für Fernzugriff, Fernsupport und Fernwartung von Computern, Servern, virtuellen Maschinen und mobilen Geräten.

Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in ConnectWise ScreenConnect ausnutzen, um Sicherheitsvorkehrungen zu umgehen, und potenziell um seine Privilegien zu erhöhen.

Betroffene Betriebssysteme: - Linux - Sonstiges - UNIX - Windows

CVE-2026-3564

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
ConnectWise ScreenConnect <26.1 ConnectWise / ScreenConnect		<26.1

References

4 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://www.connectwise.com/company/trust/securit…	external
https://euvd.enisa.europa.eu/enisa/EUVD-2026-12574	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "ConnectWise ScreenConnect ist eine Softwarel\u00f6sung f\u00fcr Fernzugriff, Fernsupport und Fernwartung von Computern, Servern, virtuellen Maschinen und mobilen Ger\u00e4ten.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in ConnectWise ScreenConnect ausnutzen, um Sicherheitsvorkehrungen zu umgehen, und potenziell um seine Privilegien zu erh\u00f6hen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-0763 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0763.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0763 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0763"
      },
      {
        "category": "external",
        "summary": "ConnectWise Security Bulletin vom 2026-03-17",
        "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
      },
      {
        "category": "external",
        "summary": "EU Vulnerability Database vom 2026-03-17",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-12574"
      }
    ],
    "source_lang": "en-US",
    "title": "ConnectWise ScreenConnect: Schwachstelle erm\u00f6glicht Umgehen von Sicherheitsvorkehrungen und potenziell Privilegieneskalation",
    "tracking": {
      "current_release_date": "2026-03-17T23:00:00.000+00:00",
      "generator": {
        "date": "2026-03-18T11:13:07.359+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0763",
      "initial_release_date": "2026-03-17T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-03-17T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c26.1",
                "product": {
                  "name": "ConnectWise ScreenConnect \u003c26.1",
                  "product_id": "T051822"
                }
              },
              {
                "category": "product_version",
                "name": "26.1",
                "product": {
                  "name": "ConnectWise ScreenConnect 26.1",
                  "product_id": "T051822-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:connectwise:screenconnect:26.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "ScreenConnect"
          }
        ],
        "category": "vendor",
        "name": "ConnectWise"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-3564",
      "product_status": {
        "known_affected": [
          "T051822"
        ]
      },
      "release_date": "2026-03-17T23:00:00.000+00:00",
      "title": "CVE-2026-3564"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-3564 (GCVE-0-2026-3564)

FKIE_CVE-2026-3564

GHSA-HRC2-HCHG-RQ8R

WID-SEC-W-2026-0763

Tags

Sightings

Nomenclature