Vulnerability-Lookup

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

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JSON

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{
  "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"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-03-17 14:48 – Updated: 2026-03-18 03:55

Title

ScreenConnect Instance Level Cryptographic Material Exposure

Summary

Severity ?

9 (Critical)


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

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

ConnectWise

References

URL

Tags

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

Impacted products

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

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3564",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-17T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-18T03:55:41.186Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "ScreenConnect",
          "vendor": "ConnectWise",
          "versions": [
            {
              "status": "affected",
              "version": "All versions prior to 26.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "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.\u003cbr\u003e\u003cdiv\u003e\n\n\n\n\n\n\u003cdiv\u003e\n\n\u003cdiv\u003e\u003ca\u003e\u003c/a\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\n\n\u003c/div\u003e\n\n\u003c/div\u003e\n\n\u003c/div\u003e"
            }
          ],
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347 Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-17T14:48:59.940Z",
        "orgId": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
        "shortName": "ConnectWise"
      },
      "references": [
        {
          "url": "https://www.connectwise.com/company/trust/security-bulletins/2026-03-17-screenconnect-bulletin"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\n\n\u003cp\u003e\u003cb\u003eCloud:\u0026nbsp;\u003c/b\u003eNo action is required. ScreenConnect servers hosted in\n\u201cscreenconnect.com\u201d cloud (standalone and Automate/RMM integrated) or\n\u201chostedrmm.com\u201d for Automate partners have been updated to remediate the\nissue.\u202f\u0026nbsp;\u003c/p\u003e\n\n\u003cp\u003e\u003cb\u003eOn-premise\u003c/b\u003e\u0026nbsp;\u003cb\u003eScreenConnect\u003c/b\u003e \u003cb\u003ePartners:\u003c/b\u003e\u003c/p\u003e\n\n\n\n\u003cp\u003ePlease upgrade to ScreenConnect version 26.1. Visit \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://www.screenconnect.com/download\"\u003eDownload\n| ScreenConnect\u003c/a\u003e page to download and apply the update \u003ci\u003e(access\nrequires a valid on-premises license)\u003c/i\u003e.\u0026nbsp;\u003c/p\u003e\n\n\n\n\u003cp\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003eIf your license is out of maintenance, you must \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://docs.connectwise.com/ScreenConnect_Documentation/On-premises/On-premises_licensing/Renew_or_upgrade_an_on-premises_license\"\u003eupgrade your license\u003c/a\u003e\u0026nbsp;before installing\nthe latest supported release of ScreenConnect. \u003c/li\u003e\u003cli\u003eFor\ninstructions on updating to the newest release, please reference this\ndoc: \u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://docs.connectwise.com/ConnectWise_ScreenConnect_Documentation/On-premises/Get_started_with_ConnectWise_ScreenConnect_On-Premise/Upgrade_an_on-premises_installation\"\u003eUpgrade an on-premise\ninstallation - ConnectWise\u003c/a\u003e\u0026nbsp;\u003c/li\u003e\u003c/ul\u003e\u003cp\u003e\u003c/p\u003e\n\n\n\n\n\n\n\n\u003cp\u003e\u003cb\u003eAutomate On-Prem Partners with ScreenConnect\nIntegration\u003c/b\u003e:\u003c/p\u003e\n\n\u003cp\u003eFor partners using an on-premises ScreenConnect\ninstallation integrated with Automate, ScreenConnect 26.1 is available through\nthe \u003ca href=\"https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates\"\u003eAutomate Product Updates\u003c/a\u003e page.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e\n\n\u003cp\u003eLink to release\nnotes: \u003ca href=\"https://screenconnect.product.connectwise.com/communities/26/topics/5088-screenconnect-261\"\u003eScreenConnect 26.1 / ScreenConnect\u003c/a\u003e\u003c/p\u003e"
            }
          ],
          "value": "Cloud:\u00a0No action is required. ScreenConnect servers hosted in\n\u201cscreenconnect.com\u201d cloud (standalone and Automate/RMM integrated) or\n\u201chostedrmm.com\u201d for Automate partners have been updated to remediate the\nissue.\u202f\u00a0\n\n\n\nOn-premise\u00a0ScreenConnect Partners:\n\n\n\n\n\nPlease upgrade to ScreenConnect version 26.1. Visit Download\n| ScreenConnect page to download and apply the update (access\nrequires a valid on-premises license).\u00a0\n\n\n\n\n\n\n\n  *  If your license is out of maintenance, you must  upgrade your license https://docs.connectwise.com/ScreenConnect_Documentation/On-premises/On-premises_licensing/Renew_or_upgrade_an_on-premises_license \u00a0before installing\nthe latest supported release of ScreenConnect. \n  *  For\ninstructions on updating to the newest release, please reference this\ndoc: Upgrade an on-premise\ninstallation - ConnectWise\u00a0\n\n\n\n\n\n\n\n\n\n\n\n\nAutomate On-Prem Partners with ScreenConnect\nIntegration:\n\n\n\nFor partners using an on-premises ScreenConnect\ninstallation integrated with Automate, ScreenConnect 26.1 is available through\nthe  Automate Product Updates https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates  page.\n\n\n\n\n\n\nLink to release\nnotes:  ScreenConnect 26.1 / ScreenConnect https://screenconnect.product.connectwise.com/communities/26/topics/5088-screenconnect-261"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "ScreenConnect Instance Level Cryptographic Material Exposure",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7d616e1a-3288-43b1-a0dd-0a65d3e70a49",
    "assignerShortName": "ConnectWise",
    "cveId": "CVE-2026-3564",
    "datePublished": "2026-03-17T14:48:59.940Z",
    "dateReserved": "2026-03-04T20:04:12.757Z",
    "dateUpdated": "2026-03-18T03:55:41.186Z",
    "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

GHSA-HRC2-HCHG-RQ8R

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

Tags

Sightings

Nomenclature