CVE-2023-20178 (GCVE-0-2023-20178)
Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2026-10-08 21:14
VLAI
EPSS
VEX
Summary
A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established.
This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 21:11 UTC
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco Secure Client |
Affected:
4.9.00086
Affected: 4.9.01095 Affected: 4.9.02028 Affected: 4.9.03047 Affected: 4.9.03049 Affected: 4.9.04043 Affected: 4.9.04053 Affected: 4.9.05042 Affected: 4.9.06037 Affected: 4.10.00093 Affected: 4.10.01075 Affected: 4.10.02086 Affected: 4.10.03104 Affected: 4.10.04065 Affected: 4.10.04071 Affected: 4.10.05085 Affected: 4.10.05095 Affected: 4.10.05111 Affected: 4.10.06079 Affected: 4.10.06090 Affected: 5.0.00238 Affected: 5.0.00529 Affected: 5.0.00556 Affected: 5.0.01242 |
guessed |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T09:05:34.960Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"tags": [
"x_transferred"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-20178",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T21:11:33.901072Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T21:14:03.615Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Secure Client",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.9.00086"
},
{
"status": "affected",
"version": "4.9.01095"
},
{
"status": "affected",
"version": "4.9.02028"
},
{
"status": "affected",
"version": "4.9.03047"
},
{
"status": "affected",
"version": "4.9.03049"
},
{
"status": "affected",
"version": "4.9.04043"
},
{
"status": "affected",
"version": "4.9.04053"
},
{
"status": "affected",
"version": "4.9.05042"
},
{
"status": "affected",
"version": "4.9.06037"
},
{
"status": "affected",
"version": "4.10.00093"
},
{
"status": "affected",
"version": "4.10.01075"
},
{
"status": "affected",
"version": "4.10.02086"
},
{
"status": "affected",
"version": "4.10.03104"
},
{
"status": "affected",
"version": "4.10.04065"
},
{
"status": "affected",
"version": "4.10.04071"
},
{
"status": "affected",
"version": "4.10.05085"
},
{
"status": "affected",
"version": "4.10.05095"
},
{
"status": "affected",
"version": "4.10.05111"
},
{
"status": "affected",
"version": "4.10.06079"
},
{
"status": "affected",
"version": "4.10.06090"
},
{
"status": "affected",
"version": "5.0.00238"
},
{
"status": "affected",
"version": "5.0.00529"
},
{
"status": "affected",
"version": "5.0.00556"
},
{
"status": "affected",
"version": "5.0.01242"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established.\r\n\r This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-276",
"description": "Incorrect Default Permissions",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-25T16:57:50.608Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
}
],
"source": {
"advisory": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"defects": [
"CSCwe00252"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2023-20178",
"datePublished": "2023-06-28T00:00:00.000Z",
"dateReserved": "2022-10-27T00:00:00.000Z",
"dateUpdated": "2026-10-08T21:14:03.615Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-20178",
"date": "2026-10-29",
"epss": "0.05374",
"percentile": "0.92638"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Cisco Secure Client",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.9.00086"
},
{
"status": "affected",
"version": "4.9.01095"
},
{
"status": "affected",
"version": "4.9.02028"
},
{
"status": "affected",
"version": "4.9.03047"
},
{
"status": "affected",
"version": "4.9.03049"
},
{
"status": "affected",
"version": "4.9.04043"
},
{
"status": "affected",
"version": "4.9.04053"
},
{
"status": "affected",
"version": "4.9.05042"
},
{
"status": "affected",
"version": "4.9.06037"
},
{
"status": "affected",
"version": "4.10.00093"
},
{
"status": "affected",
"version": "4.10.01075"
},
{
"status": "affected",
"version": "4.10.02086"
},
{
"status": "affected",
"version": "4.10.03104"
},
{
"status": "affected",
"version": "4.10.04065"
},
{
"status": "affected",
"version": "4.10.04071"
},
{
"status": "affected",
"version": "4.10.05085"
},
{
"status": "affected",
"version": "4.10.05095"
},
{
"status": "affected",
"version": "4.10.05111"
},
{
"status": "affected",
"version": "4.10.06079"
},
{
"status": "affected",
"version": "4.10.06090"
},
{
"status": "affected",
"version": "5.0.00238"
},
{
"status": "affected",
"version": "5.0.00529"
},
{
"status": "affected",
"version": "5.0.00556"
},
{
"status": "affected",
"version": "5.0.01242"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:anyconnect_secure_mobility_client:*:*:*:*:*:windows:*:*",
"matchCriteriaId": "9980A481-8A54-475A-B735-0C339FF30314",
"versionEndExcluding": "4.10.07061",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:cisco:secure_client:*:*:*:*:*:windows:*:*",
"matchCriteriaId": "7A856448-9BF4-4693-A1EA-3B6C06DB4259",
"versionEndExcluding": "5.0.02075",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established.\r\n\r This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges."
}
],
"id": "CVE-2023-20178",
"lastModified": "2026-10-08T22:17:22.420",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-20178",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T21:11:33.901072Z",
"version": "2.0.3"
}
}
]
},
"published": "2023-06-28T15:15:09.880",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-03-27T11:50:26+00:00",
"cve": "CVE-2023-20178",
"id": "CVE-2023-20178",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2023-20178",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-20178.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T09:05:34.960Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"tags": [
"x_transferred"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-20178",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-08T21:11:33.901072Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-08T21:11:34.425Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Secure Client",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "4.9.00086"
},
{
"status": "affected",
"version": "4.9.01095"
},
{
"status": "affected",
"version": "4.9.02028"
},
{
"status": "affected",
"version": "4.9.03047"
},
{
"status": "affected",
"version": "4.9.03049"
},
{
"status": "affected",
"version": "4.9.04043"
},
{
"status": "affected",
"version": "4.9.04053"
},
{
"status": "affected",
"version": "4.9.05042"
},
{
"status": "affected",
"version": "4.9.06037"
},
{
"status": "affected",
"version": "4.10.00093"
},
{
"status": "affected",
"version": "4.10.01075"
},
{
"status": "affected",
"version": "4.10.02086"
},
{
"status": "affected",
"version": "4.10.03104"
},
{
"status": "affected",
"version": "4.10.04065"
},
{
"status": "affected",
"version": "4.10.04071"
},
{
"status": "affected",
"version": "4.10.05085"
},
{
"status": "affected",
"version": "4.10.05095"
},
{
"status": "affected",
"version": "4.10.05111"
},
{
"status": "affected",
"version": "4.10.06079"
},
{
"status": "affected",
"version": "4.10.06090"
},
{
"status": "affected",
"version": "5.0.00238"
},
{
"status": "affected",
"version": "5.0.00529"
},
{
"status": "affected",
"version": "5.0.00556"
},
{
"status": "affected",
"version": "5.0.01242"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the client update process of Cisco AnyConnect Secure Mobility Client Software for Windows and Cisco Secure Client Software for Windows could allow a low-privileged, authenticated, local attacker to elevate privileges to those of SYSTEM. The client update process is executed after a successful VPN connection is established.\r\n\r This vulnerability exists because improper permissions are assigned to a temporary directory that is created during the update process. An attacker could exploit this vulnerability by abusing a specific function of the Windows installer process. A successful exploit could allow the attacker to execute code with SYSTEM privileges."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerability that is described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-276",
"description": "Incorrect Default Permissions",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-25T16:57:50.608Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ac-csc-privesc-wx4U4Kw"
}
],
"source": {
"advisory": "cisco-sa-ac-csc-privesc-wx4U4Kw",
"defects": [
"CSCwe00252"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2023-20178",
"datePublished": "2023-06-28T00:00:00.000Z",
"dateReserved": "2022-10-27T00:00:00.000Z",
"dateUpdated": "2026-10-08T21:14:03.615Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
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.