{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-25687", "assignerOrgId": "73c6f63b-efac-410d-a0a9-569700f85a04", "state": "PUBLISHED", "assignerShortName": "Zscaler", "dateReserved": "2026-02-05T05:00:40.582Z", "datePublished": "2026-09-14T14:37:04.331Z", "dateUpdated": "2026-09-15T03:56:03.896Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "73c6f63b-efac-410d-a0a9-569700f85a04", "shortName": "Zscaler", "dateUpdated": "2026-09-14T14:37:04.331Z"}, "title": "ZCC race condition in ZPA tunnel handler", "datePublic": "2026-09-14T14:36:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-366", "description": "CWE-366 Race condition within a thread", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-549", "descriptions": [{"lang": "en", "value": "CAPEC-549 Local Execution of Code"}]}], "affected": [{"vendor": "Zscaler", "product": "Client Connector", "platforms": ["Windows"], "versions": [{"status": "affected", "version": "4.6", "lessThan": "4.6.0.486", "versionType": "custom"}, {"status": "affected", "version": "4.7", "lessThan": "4.7.0.350", "versionType": "custom"}, {"status": "affected", "version": "4.8", "lessThan": "4.8.0.267", "versionType": "custom"}, {"status": "affected", "version": "4.9", "lessThan": "4.9.0.412", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process."}]}], "references": [{"url": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "credits": [{"lang": "en", "value": "GovTech Singapore Red Team", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}, "x_gcve": [{"vulnId": "CVE-2026-25687", "recordType": "advisory"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-14T00:00:00+00:00", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3", "id": "CVE-2026-25687"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-15T03:56:03.896Z"}}]}, "vulnerability-lookup:meta": {"epss": {"cve": "CVE-2026-25687", "date": "2026-10-13", "epss": "0.0038", "percentile": "0.3009"}, "nvd": "{\"cve\":{\"id\":\"CVE-2026-25687\",\"sourceIdentifier\":\"cve@zscaler.com\",\"published\":\"2026-09-14T15:17:05.090\",\"lastModified\":\"2026-09-18T19:08:02.707\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.\"}],\"affected\":[{\"source\":\"cve@zscaler.com\",\"affectedData\":[{\"vendor\":\"Zscaler\",\"product\":\"Client Connector\",\"defaultStatus\":\"unaffected\",\"platforms\":[\"Windows\"],\"versions\":[{\"version\":\"4.6\",\"lessThan\":\"4.6.0.486\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"4.7\",\"lessThan\":\"4.7.0.350\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"4.8\",\"lessThan\":\"4.8.0.267\",\"versionType\":\"custom\",\"status\":\"affected\"},{\"version\":\"4.9\",\"lessThan\":\"4.9.0.412\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-14T00:00:00+00:00\",\"id\":\"CVE-2026-25687\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"cve@zscaler.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-366\"}]}],\"references\":[{\"url\":\"https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026\",\"source\":\"cve@zscaler.com\"}]}}", "vulnrichment": {"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-25687\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-14T15:33:09.117567Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-14T15:39:38.835Z\"}}], \"cna\": {\"title\": \"ZCC race condition in ZPA tunnel handler\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"GovTech Singapore Red Team\"}], \"impacts\": [{\"capecId\": \"CAPEC-549\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-549 Local Execution of Code\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Zscaler\", \"product\": \"Client Connector\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.6\", \"lessThan\": \"4.6.0.486\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"4.7\", \"lessThan\": \"4.7.0.350\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"4.8\", \"lessThan\": \"4.8.0.267\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"4.9\", \"lessThan\": \"4.9.0.412\", \"versionType\": \"custom\"}], \"platforms\": [\"Windows\"], \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-09-14T14:36:00.000Z\", \"references\": [{\"url\": \"https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2026\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.4\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A race condition in the ZPA tunnel handler of affected versions of Zscaler Client Connector (ZCC) allows a heap corruption, resulting in a denial of service (client crash) and potentially arbitrary code execution in the context of the ZCC process.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-366\", \"description\": \"CWE-366 Race condition within a thread\"}]}], \"providerMetadata\": {\"orgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"shortName\": \"Zscaler\", \"dateUpdated\": \"2026-09-14T14:37:04.331Z\"}}}", "cveMetadata": "{\"cveId\": \"CVE-2026-25687\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-15T03:56:03.896Z\", \"dateReserved\": \"2026-02-05T05:00:40.582Z\", \"assignerOrgId\": \"73c6f63b-efac-410d-a0a9-569700f85a04\", \"datePublished\": \"2026-09-14T14:37:04.331Z\", \"assignerShortName\": \"Zscaler\"}", "dataType": "CVE_RECORD", "dataVersion": "5.2"}}}