CVE-2021-35035

View on CVE.org

Published Dec 29, 2021 CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed

Description

A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.

Analysis

No analysis available yet

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Zyxel

NBG6604 series firmware

affected

Version	Status	Constraints
`1.00(ABIR.8)C0`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:zyxel:nbg6604_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:zyxel:nbg6604:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2021-21682	A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact None

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.668% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml

History

No history.

Subscriptions

Zyxel Nbg6604 Nbg6604 Firmware

Weaknesses

CWE-312
Cleartext Storage of Sensitive Information

Sources

CVE record Updated: Aug 4, 2024, 12:33 AM

Status: PUBLISHED
Assigner: Zyxel
Published: Dec 29, 2021, 12:45 PM
Updated: Aug 4, 2024, 12:33 AM
Reserved: Jun 17, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:57 AM

Status: Modified
Published: Dec 29, 2021, 1:15 PM
Modified: Jun 17, 2026, 3:57 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"containers": {"cna": {"affected": [{"product": "NBG6604 series firmware", "vendor": "Zyxel", "versions": [{"status": "affected", "version": "1.00(ABIR.8)C0"}]}], "descriptions": [{"lang": "en", "value": "A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-312", "description": "CWE-312: Cleartext Storage of Sensitive Information", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-12-29T12:45:38.000Z", "orgId": "96e50032-ad0d-4058-a115-4d2c13821f9f", "shortName": "Zyxel"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@zyxel.com.tw", "ID": "CVE-2021-35035", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "NBG6604 series firmware", "version": {"version_data": [{"version_value": "1.00(ABIR.8)C0"}]}}]}, "vendor_name": "Zyxel"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file."}]}, "impact": {"cvss": {"baseScore": "4.9", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-312: Cleartext Storage of Sensitive Information"}]}]}, "references": {"reference_data": [{"name": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml", "refsource": "CONFIRM", "url": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:33:49.910Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml"}]}]}, "cveMetadata": {"assignerOrgId": "96e50032-ad0d-4058-a115-4d2c13821f9f", "assignerShortName": "Zyxel", "cveId": "CVE-2021-35035", "datePublished": "2021-12-29T12:45:38.000Z", "dateReserved": "2021-06-17T00:00:00.000Z", "dateUpdated": "2024-08-04T00:33:49.910Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"product": "NBG6604 series firmware", "vendor": "Zyxel", "versions": [{"status": "affected", "version": "1.00(ABIR.8)C0"}]}], "source": "security@zyxel.com.tw"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nbg6604_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "C0281810-DABA-400E-B056-F25106FC034B", "versionEndExcluding": "1.00\\(abir.9\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nbg6604:-:*:*:*:*:*:*:*", "matchCriteriaId": "AFA7D096-9ED5-4F07-A746-29662765F61E", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file."}, {"lang": "es", "value": "Una vulnerabilidad de almacenamiento de texto sin cifrar de informaci\u00f3n confidencial en el firmware de Zyxel NBG6604 podr\u00eda permitir a un atacante remoto y autenticado obtener informaci\u00f3n confidencial del archivo de configuraci\u00f3n"}], "id": "CVE-2021-35035", "lastModified": "2026-06-17T03:57:01.163", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 3.6, "source": "security@zyxel.com.tw", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-29T13:15:07.893", "references": [{"source": "security@zyxel.com.tw", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/Zyxel_security_advisory_for_sensitive_information_vulnerabilities_of_NBG6604_home_router.shtml"}], "sourceIdentifier": "security@zyxel.com.tw", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-312"}], "source": "security@zyxel.com.tw", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-312"}], "source": "nvd@nist.gov", "type": "Primary"}]}