CVE-2026-4795 (GCVE-0-2026-4795)
Vulnerability from cvelistv5 – Published: 2026-05-26 01:42 – Updated: 2026-05-26 12:18
VLAI
EPSS
VEX
Summary
A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0, GS1200-8v3 firmware versions through 1.00(ACPT.2)C0, GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 12:17 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zyxel.com/global/en/support/security-… | vendor-advisory |
Impacted products
5 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Zyxel | GS1200-5v3 firmware |
Affected:
<= 1.00(ACPS.2)C0
|
guessed | |
| Zyxel | GS1200-8v3 firmware |
Affected:
<= 1.00(ACPT.2)C0
|
guessed | |
| Zyxel | GS1200-5HPv3 firmware |
Affected:
<= 1.00(ACPU.2)C0
|
guessed | |
| Zyxel | GS1200-8HPv3 firmware |
Affected:
<= 1.00(ACPV.2)C0
|
guessed | |
| Zyxel | GS1200-10v3 firmware |
Affected:
<= 1.00(ACPW.2)C0
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-4795",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-26T12:17:48.434391Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T12:18:03.665Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "GS1200-5v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPS.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPT.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-5HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPU.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPV.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-10v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPW.2)C0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0,\u0026nbsp;GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,\u0026nbsp; GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request."
}
],
"value": "A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0,\u00a0GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,\u00a0 GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862: Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T01:42:37.914Z",
"orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
"shortName": "Zyxel"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.2"
}
}
},
"cveMetadata": {
"assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
"assignerShortName": "Zyxel",
"cveId": "CVE-2026-4795",
"datePublished": "2026-05-26T01:42:37.914Z",
"dateReserved": "2026-03-25T02:49:26.644Z",
"dateUpdated": "2026-05-26T12:18:03.665Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-4795",
"date": "2026-09-25",
"epss": "0.003",
"percentile": "0.20234"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "GS1200-5v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPS.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPT.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-5HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPU.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPV.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-10v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPW.2)C0"
}
]
}
],
"source": "security@zyxel.com.tw"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0,\u00a0GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,\u00a0 GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request."
},
{
"lang": "es",
"value": "Una vulnerabilidad de autorizaci\u00f3n faltante en las versiones de firmware de Zyxel GS1200-5v3 hasta la 1.00(ACPS.2)C0, versiones de firmware de GS1200-8v3 hasta la 1.00(ACPT.2)C0, versiones de firmware de GS1200-5HPv3 hasta la 1.00(ACPU.2)C0, versiones de firmware de GS1200-8HPv3 hasta la 1.00(ACPV.2)C0, y versiones de firmware de GS1200-10v3 hasta la 1.00(ACPW.2)C0 podr\u00eda permitir a un atacante no autenticado, basado en la LAN, leer la configuraci\u00f3n del sistema de un archivo de registro a trav\u00e9s de una solicitud HTTP manipulada."
}
],
"id": "CVE-2026-4795",
"lastModified": "2026-07-24T11:10:00.170",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "security@zyxel.com.tw",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-4795",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-26T12:17:48.434391Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-05-26T02:16:40.360",
"references": [
{
"source": "security@zyxel.com.tw",
"url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026"
}
],
"sourceIdentifier": "security@zyxel.com.tw",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-862"
}
],
"source": "security@zyxel.com.tw",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-06-05T19:28:43+00:00",
"cve": "CVE-2026-4795",
"id": "CVE-2026-4795",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "CVE-2026-4795",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4795.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-4795",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-26T12:17:48.434391Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T12:17:54.620Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "GS1200-5v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPS.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPT.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-5HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPU.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-8HPv3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPV.2)C0"
}
]
},
{
"defaultStatus": "unaffected",
"product": "GS1200-10v3 firmware",
"vendor": "Zyxel",
"versions": [
{
"status": "affected",
"version": "\u003c= 1.00(ACPW.2)C0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0,\u0026nbsp;GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,\u0026nbsp; GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request."
}
],
"value": "A missing authorization vulnerability in Zyxel GS1200-5v3 firmware versions through 1.00(ACPS.2)C0,\u00a0GS1200-8v3 firmware versions through 1.00(ACPT.2)C0,\u00a0 GS1200-5HPv3 firmware versions through 1.00(ACPU.2)C0, GS1200-8HPv3 firmware versions through 1.00(ACPV.2)C0, and GS1200-10v3 firmware versions through 1.00(ACPW.2)C0 could allow a LAN-based, unauthenticated attacker to read the system configuration from a log file via a crafted HTTP request."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862: Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T01:42:37.914Z",
"orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
"shortName": "Zyxel"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-missing-authorization-vulnerability-in-gs1200v3-series-switches-05-26-2026"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 1.0.2"
}
}
},
"cveMetadata": {
"assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f",
"assignerShortName": "Zyxel",
"cveId": "CVE-2026-4795",
"datePublished": "2026-05-26T01:42:37.914Z",
"dateReserved": "2026-03-25T02:49:26.644Z",
"dateUpdated": "2026-05-26T12:18:03.665Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
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.
Loading…