CVE-2026-27806

Root escalation via Tcl command injection

Published Apr 8, 2026 · Updated Apr 8, 2026

Command injection in Fleet Orbit before 4.81.1 allows local users to execute arbitrary commands as root during FileVault key rotation. The rotation flow inserts a GUI-supplied password into brace-quoted Tcl send text and passes the resulting script to expect -c without neutralizing a closing brace. Any unprivileged user on a managed macOS endpoint can supply a closing brace to end the literal and run injected Tcl with Orbit's root privileges.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in Fleet Orbit before 4.81.1 allows local users to execute arbitrary commands as root during FileVault key rotation. The rotation flow inserts a GUI-supplied password into brace-quoted Tcl send text and passes the resulting script to expect -c without neutralizing a closing brace. Any unprivileged user on a managed macOS endpoint can supply a closing brace to end the literal and run injected Tcl with Orbit's root privileges.

The record

CVE
CVE-2026-27806
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Fleet Device Management
Product
Fleet
Classifications
CWE-78, CWE-94, T1059, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 4.81.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Fleet Device Management · Fleetversion=< 4.81.1

Published CVSS scores

7.8GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo