CVE-2025-71326 (GCVE-0-2025-71326)

Vulnerability from cvelistv5 – Published: 2026-06-19 14:16 – Updated: 2026-06-19 14:16
VLAI
Title
AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation
Summary
AVAST Antivirus 25.11 contains an unquoted service path vulnerability in the SecureLine service that allows local non-privileged users to execute code with elevated SYSTEM privileges. Attackers can exploit the unquoted binary path in the service configuration to inject malicious executables that execute with high-level system permissions.
Severity
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-428 - Unquoted Search Path or Element
Assigner
References
Impacted products
Vendor Product Version
Avast AVAST Antivirus Affected: 25.11
Create a notification for this product.
Date Public
2025-12-17 00:00
Credits
Milad Karimi (Ex3ptionaL)
Show details on NVD website
To clipboard 

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          "versions": [
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          "value": "Milad Karimi (Ex3ptionaL)"
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      ],
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          "value": "AVAST Antivirus 25.11 contains an unquoted service path vulnerability in the SecureLine service that allows local non-privileged users to execute code with elevated SYSTEM privileges. Attackers can exploit the unquoted binary path in the service configuration to inject malicious executables that execute with high-level system permissions."
        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "baseScore": 8.5,
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            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
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              "description": "Unquoted Search Path or Element",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
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        "shortName": "VulnCheck"
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      "references": [
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          "name": "ExploitDB-52510",
          "tags": [
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          ],
          "url": "https://www.exploit-db.com/exploits/52510"
        },
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          "name": "Official Product Homepage",
          "tags": [
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          ],
          "url": "https://www.avast.com/"
        },
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          "name": "VulnCheck Advisory: AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation",
          "tags": [
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      "title": "AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2025-71326",
    "datePublished": "2026-06-19T14:16:54.853Z",
    "dateReserved": "2026-06-08T20:44:31.210Z",
    "dateUpdated": "2026-06-19T14:16:54.853Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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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

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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.


Detection rules are retrieved from Rulezet.