CVE-2026-47830

SYSTEM escalation via writable service executables

Published Jul 9, 2026 · Updated Jul 9, 2026

Incorrect permissions in BOSH Windows Stemcell Builder before 2019.98 allow local users to gain SYSTEM access by replacing service executables. BOSH.Utils.psm1 leaves C:\bosh\service_wrapper.exe and C:\bosh\bosh-agent.exe writable by low-privilege authenticated users. The replaced binary runs as NT AUTHORITY\SYSTEM only after the corresponding service restarts or the host reboots, granting full host control.

CVSS severity8.5
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permissions in BOSH Windows Stemcell Builder before 2019.98 allow local users to gain SYSTEM access by replacing service executables. BOSH.Utils.psm1 leaves C:\bosh\service_wrapper.exe and C:\bosh\bosh-agent.exe writable by low-privilege authenticated users. The replaced binary runs as NT AUTHORITY\SYSTEM only after the corresponding service restarts or the host reboots, granting full host control.

The record

CVE
CVE-2026-47830
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Cloud Foundry Foundation
Product
BOSH Windows Stemcell Builder
Classifications
CWE-732, T1574.010
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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=0 <2019.98

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Cloud Foundry Foundation · BOSH Windows Stemcell Builderversion=0 <2019.98

Published CVSS scores

8.8VMwareCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5Cloud Foundry FoundationCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1574.010Services File Permissions Weakness

Public exploit references

No public exploit references are available in this record.

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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