CVE-2021-28826

Local privilege escalation via permissive installation paths

Published Apr 14, 2021 · Updated Sep 16, 2024

Incorrect authorization in TIBCO Messaging Bridge 1.3.0 and earlier allows local users to execute code with elevated privileges. The Windows installer leaves unspecified files or folders without sufficient access restrictions, allowing planted software to run under the component's elevated account. The attack requires low-privileged local access to an affected Windows host and grants full operating-system access at the component's privilege level.

CVSS severity8.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in TIBCO Messaging Bridge 1.3.0 and earlier allows local users to execute code with elevated privileges. The Windows installer leaves unspecified files or folders without sufficient access restrictions, allowing planted software to run under the component's elevated account. The attack requires low-privileged local access to an affected Windows host and grants full operating-system access at the component's privilege level.

The record

CVE
CVE-2021-28826
Published
Apr 14, 2021
Updated
Sep 16, 2024
Vendor
TIBCO Software Inc.
Product
TIBCO Messaging - Eclipse Mosquitto Distribution - Bridge - Community Edition
Classifications
CWE-863, T1574
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=unspecified <=1.3.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TIBCO Software Inc. · TIBCO Messaging - Eclipse Mosquitto Distribution - Bridge - Community Editionversion=unspecified <=1.3.0
TIBCO Software Inc. · TIBCO Messaging - Eclipse Mosquitto Distribution - Bridge - Enterprise Editionversion=unspecified <=1.3.0

Published CVSS scores

8.8TIBCO Software Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
7.2NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST National Vulnerability DatabaseCVSS: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-863Incorrect Authorization
T1574Hijack Execution Flow

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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