CVE-2020-36879Public exploit

Local privilege escalation via unquoted service paths

Published Dec 5, 2025 · Updated Dec 5, 2025

Unquoted service paths in Flexense DiskBoss 11.7.28 allow local users to execute code with LocalSystem privileges at service start. The registered Windows service ImagePath values omit quotation marks around executable paths under Program Files, causing Windows to search higher-level path segments for an attacker-controlled executable. Exploitation requires local low-privileged access to place a matching executable in a searched location, and execution occurs when an affected service starts or the host reboots.

CVSS severity8.5
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unquoted service paths in Flexense DiskBoss 11.7.28 allow local users to execute code with LocalSystem privileges at service start. The registered Windows service ImagePath values omit quotation marks around executable paths under Program Files, causing Windows to search higher-level path segments for an attacker-controlled executable. Exploitation requires local low-privileged access to place a matching executable in a searched location, and execution occurs when an affected service starts or the host reboots.

The record

CVE
CVE-2020-36879
Published
Dec 5, 2025
Updated
Dec 5, 2025
Vendor
Flexense Ltd.
Product
DiskBoss Ultimate
Classifications
CWE-428, T1574.009
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.7.28

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Flexense Ltd. · DiskBoss Ultimateversion=11.7.28
Flexense Ltd. · DiskBoss Enterpriseversion=11.7.28
Flexense Ltd. · DiskBoss Proversion=11.7.28
Flexense Ltd. · DiskBossversion=11.7.28
Flexense Ltd. · DiskBoss Serverversion=11.7.28

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-428Unquoted Search Path or Element
T1574.009Path Interception by Unquoted Path

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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