CVE-2026-19983

A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched remotely. Upgrading to version 4.9.0 is capable of addressing this issue. It is suggested to upgrade the affected component. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."

CVSS v3 8.3 HIGH
CVSS v2.0 7.5 HIGH

8.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/NAS%20Host-header%20bypass%20to%20unauthenticated%20root%20RCE.md
https://vuldb.com/cve/CVE-2026-19983
https://vuldb.com/submit/873919
https://vuldb.com/vuln/391165
https://vuldb.com/vuln/391165/cti

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-17 05:17

Updated : 2026-08-20 12:48

NVD link : CVE-2026-19983

Mitre link : CVE-2026-19983

CVE.ORG link : CVE-2026-19983

JSON object : View

Products Affected

No product.

CWE

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

{"id": "CVE-2026-19983", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-19983", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-17T15:29:02.892698Z"}}], "cvssMetricV2": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.7, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@vuldb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@vuldb.com", "affectedData": [{"cpes": ["cpe:2.3:a:gl.inet:a1300:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "A1300", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:ax1800:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "AX1800", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:axt1800:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "AXT1800", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:mt2500:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "MT2500", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:mt3000:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "MT3000", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:mt6000:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "MT6000", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:x3000:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "X3000", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}, {"cpes": ["cpe:2.3:a:gl.inet:xe3000:*:*:*:*:*:*:*:*"], "vendor": "GL.iNet", "modules": ["NAS Command Service"], "product": "XE3000", "versions": [{"status": "affected", "version": "4.8.*"}, {"status": "unaffected", "version": "4.9.0"}]}]}], "published": "2026-08-17T05:17:09.947", "references": [{"url": "https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/NAS%20Host-header%20bypass%20to%20unauthenticated%20root%20RCE.md", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/cve/CVE-2026-19983", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/submit/873919", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/391165", "source": "cna@vuldb.com"}, {"url": "https://vuldb.com/vuln/391165/cti", "source": "cna@vuldb.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cna@vuldb.com", "description": [{"lang": "en", "value": "CWE-77"}, {"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched remotely. Upgrading to version 4.9.0 is capable of addressing this issue. It is suggested to upgrade the affected component. The vendor explains: \"After our investigation, we have confirmed that the vulnerability described (...) does indeed exist.\""}], "lastModified": "2026-08-20T12:48:10.287", "sourceIdentifier": "cna@vuldb.com"}