CVE-2026-0392

eParakstītājs 3.0 for Windows before version 1.10.0 retrieves and executes its automatic updates over a channel that is not authenticated or integrity-protected. On each launch the application fetches an update descriptor (XML) over TLS but accepts any TLS certificate (a permissive TrustManager and a HostnameVerifier that always returns true), does not verify any digital signature on the update descriptor, and does not verify the Authenticode signature or a checksum of the downloaded installer before running it. A man-in-the-middle attacker able to redirect www.eparaksts.lv can serve a crafted update descriptor pointing to an attacker-controlled executable, which the client downloads and executes, resulting in arbitrary code execution on the victim host.

CVSS

No CVSS.

References

Link	Resource
https://cvd.cert.lv/inbox/view/vuln-all-1689187061
https://offseq.com/en/research/eparakstitajs-cve-2026-0392/
https://www.eparaksts.lv/lv/par_mums/Jaunumi/Jauna_eParakstitajs_30_versija_1100

Configurations

No configuration.

History

23 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) eParakst?t?js 3.0 para Windows anterior a la versión 1.10.0 recupera y ejecuta sus actualizaciones automáticas a través de un canal que no está autenticado ni protegido en cuanto a integridad. En cada inicio, la aplicación obtiene un descriptor de actualización (XML) a través de TLS, pero acepta cualquier certificado TLS (un TrustManager permisivo y un HostnameVerifier que siempre devuelve verdadero), no verifica ninguna firma digital en el descriptor de actualización y no verifica la firma Authenticode ni una suma de comprobación del instalador descargado antes de ejecutarlo. Un atacante man-in-the-middle capaz de redirigir www.eparaksts.lv puede servir un descriptor de actualización manipulado que apunta a un ejecutable controlado por el atacante, que el cliente descarga y ejecuta, lo que resulta en ejecución de código arbitrario en el host víctima.

Information

Published : 2026-08-03 10:16

Updated : 2026-10-23 22:10

NVD link : CVE-2026-0392

Mitre link : CVE-2026-0392

CVE.ORG link : CVE-2026-0392

JSON object : View

Products Affected

No product.

CWE

CWE-295

Improper Certificate Validation

CWE-347

Improper Verification of Cryptographic Signature

CWE-494

Download of Code Without Integrity Check

{"id": "CVE-2026-0392", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-0392", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-03T10:35:21.949793Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.3, "Automatable": "NOT_DEFINED", "attackVector": "ADJACENT", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "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": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158", "affectedData": [{"vendor": "Latvijas Valsts radio un telev\u012bzijas centrs (LVRTC)", "product": "eParakst\u012bt\u0101js 3.0", "versions": [{"status": "affected", "version": "0", "lessThan": "1.10.0", "versionType": "semver"}], "platforms": ["Windows"], "defaultStatus": "unaffected"}]}], "published": "2026-08-03T10:16:27.747", "references": [{"url": "https://cvd.cert.lv/inbox/view/vuln-all-1689187061", "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"}, {"url": "https://offseq.com/en/research/eparakstitajs-cve-2026-0392/", "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"}, {"url": "https://www.eparaksts.lv/lv/par_mums/Jaunumi/Jauna_eParakstitajs_30_versija_1100", "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158", "description": [{"lang": "en", "value": "CWE-295"}, {"lang": "en", "value": "CWE-347"}, {"lang": "en", "value": "CWE-494"}]}], "descriptions": [{"lang": "en", "value": "eParakst\u012bt\u0101js 3.0 for Windows before version\n1.10.0 retrieves and executes its automatic updates over a channel that is not\nauthenticated or integrity-protected. On each launch the application fetches an\nupdate descriptor (XML) over TLS but accepts any TLS certificate (a permissive\nTrustManager and a HostnameVerifier that always returns true), does not verify\nany digital signature on the update descriptor, and does not verify the\nAuthenticode signature or a checksum of the downloaded installer before running\nit. A man-in-the-middle attacker able to redirect www.eparaksts.lv can serve a\ncrafted update descriptor pointing to an attacker-controlled executable, which\nthe client downloads and executes, resulting in arbitrary code execution on the\nvictim host."}, {"lang": "es", "value": "eParakst?t?js 3.0 para Windows anterior a la versi\u00f3n 1.10.0 recupera y ejecuta sus actualizaciones autom\u00e1ticas a trav\u00e9s de un canal que no est\u00e1 autenticado ni protegido en cuanto a integridad. En cada inicio, la aplicaci\u00f3n obtiene un descriptor de actualizaci\u00f3n (XML) a trav\u00e9s de TLS, pero acepta cualquier certificado TLS (un TrustManager permisivo y un HostnameVerifier que siempre devuelve verdadero), no verifica ninguna firma digital en el descriptor de actualizaci\u00f3n y no verifica la firma Authenticode ni una suma de comprobaci\u00f3n del instalador descargado antes de ejecutarlo. Un atacante man-in-the-middle capaz de redirigir www.eparaksts.lv puede servir un descriptor de actualizaci\u00f3n manipulado que apunta a un ejecutable controlado por el atacante, que el cliente descarga y ejecuta, lo que resulta en ejecuci\u00f3n de c\u00f3digo arbitrario en el host v\u00edctima."}], "lastModified": "2026-10-23T22:10:00.160", "sourceIdentifier": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158"}