GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-49464 (GCVE-0-2025-49464)

Vulnerability from cvelistv5 – Published: 2025-07-10 16:32 – Updated: 2025-07-10 18:01
VLAI
Title
Zoom Clients for Windows- Classic Buffer Overflow
Summary
Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-10 18:01 UTC
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
Impacted products
Vendor Product Version CPE status
Zoom Communications Inc. Zoom Clients for Windows Affected: 0 , < 6.4.5 (custom)
guessed Create a notification for this product.
Date Public
2025-07-08 12:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-49464",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-10T18:01:39.709834Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-10T18:01:56.630Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Windows"
          ],
          "product": "Zoom Clients for Windows",
          "vendor": "Zoom Communications Inc.",
          "versions": [
            {
              "lessThan": "6.4.5",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2025-07-08T12:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.\u003cbr\u003e\u003cbr\u003e\n\n\u003cbr\u003e"
            }
          ],
          "value": "Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-10T16:34:13.614Z",
        "orgId": "99b9af0d-a833-4a5d-9e2f-8b1324f35351",
        "shortName": "Zoom"
      },
      "references": [
        {
          "url": "https://https://www.zoom.com/en/trust/security-bulletin/zsb-25028/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Zoom Clients for Windows- Classic Buffer Overflow",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99b9af0d-a833-4a5d-9e2f-8b1324f35351",
    "assignerShortName": "Zoom",
    "cveId": "CVE-2025-49464",
    "datePublished": "2025-07-10T16:32:20.259Z",
    "dateReserved": "2025-06-04T22:48:18.921Z",
    "dateUpdated": "2025-07-10T18:01:56.630Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-49464",
      "date": "2026-09-15",
      "epss": "0.00611",
      "percentile": "0.47471"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-49464\",\"sourceIdentifier\":\"security@zoom.us\",\"published\":\"2025-07-10T17:15:47.897\",\"lastModified\":\"2026-06-17T09:31:21.333\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.\"},{\"lang\":\"es\",\"value\":\"El desbordamiento de b\u00fafer cl\u00e1sico en ciertos clientes Zoom para Windows puede permitir que un usuario autorizado realice una denegaci\u00f3n de servicio a trav\u00e9s del acceso a la red.\"}],\"affected\":[{\"source\":\"security@zoom.us\",\"affectedData\":[{\"vendor\":\"Zoom Communications Inc.\",\"product\":\"Zoom Clients for Windows\",\"defaultStatus\":\"unaffected\",\"platforms\":[\"Windows\"],\"versions\":[{\"version\":\"0\",\"lessThan\":\"6.4.5\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@zoom.us\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2025-07-10T18:01:39.709834Z\",\"id\":\"CVE-2025-49464\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@zoom.us\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:zoom:zoom:*:*:*:*:*:windows:*:*\",\"versionEndExcluding\":\"6.4.5\",\"matchCriteriaId\":\"32519CD0-2C2C-4714-AF4B-777D4C2550C7\"}]}]}],\"references\":[{\"url\":\"https://https://www.zoom.com/en/trust/security-bulletin/zsb-25028/\",\"source\":\"security@zoom.us\",\"tags\":[\"Broken Link\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2025-07-12T17:16:56+00:00",
      "cve": "CVE-2025-49464",
      "id": "CVE-2025-49464",
      "initial_release_date": "2025-07-08T12:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Zoom Clients for Windows- Classic Buffer Overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-49464.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-49464\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-07-10T18:01:39.709834Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-07-10T18:01:48.280Z\"}}], \"cna\": {\"title\": \"Zoom Clients for Windows- Classic Buffer Overflow\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Zoom Communications Inc.\", \"product\": \"Zoom Clients for Windows\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"6.4.5\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows\"], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2025-07-08T12:00:00.000Z\", \"references\": [{\"url\": \"https://https://www.zoom.com/en/trust/security-bulletin/zsb-25028/\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Classic buffer overflow in certain Zoom Clients for Windows may allow an authorised user to conduct a denial of service via network access.\u003cbr\u003e\u003cbr\u003e\\n\\n\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-120\", \"description\": \"CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"99b9af0d-a833-4a5d-9e2f-8b1324f35351\", \"shortName\": \"Zoom\", \"dateUpdated\": \"2025-07-10T16:34:13.614Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-49464\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-07-10T18:01:56.630Z\", \"dateReserved\": \"2025-06-04T22:48:18.921Z\", \"assignerOrgId\": \"99b9af0d-a833-4a5d-9e2f-8b1324f35351\", \"datePublished\": \"2025-07-10T16:32:20.259Z\", \"assignerShortName\": \"Zoom\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.