CVE-2025-12838

Estado: AplazadaAlta (7.3)—

MSP360 Free Backup Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of MSP360 Free Backup. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. User interaction on the part of an administrator is needed additionally.

The specific flaw exists within the restore functionality. By creating a junction, an attacker can abuse the service to create arbitrary files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-27245.

CVSS

Versión: 3.0
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Puntuación base: 7.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.18%
Percentil entre todas las CVEs puntuadas: 7
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1203 Exploitation for Client Executionexecution90 %
Impacto principalT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto secundarioT1059 Command and Scripting Interpreterexecution80 %

AV:L + UI:R (usuario admin abre fichero preparado) → T1203. Escalada a SYSTEM mediante seguimiento de enlaces (CWE-59) → T1068. Ejecución de código arbitrario en contexto SYSTEM → T1059.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software Threat Intelligence Program Restrict Web-Based Content

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Msp360 — Free Backup^AI

CWE

CWE-59

Referencias

https://www.zerodayinitiative.com/advisories/ZDI-25-988/

JSON original (NVD)

Mostrar

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          "id": "CVE-2025-12838",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
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            {
              "automatable": "no"
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            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2025-12-24T16:06:17.026368Z"
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          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
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      "source": "zdi-disclosures@trendmicro.com",
      "affectedData": [
        {
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          "product": "Free Backup",
          "versions": [
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  "published": "2025-12-23T22:15:44.277",
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  "lastModified": "2026-06-17T08:33:03.620",
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