What is CVE-2021-28822?

CVE-2021-28822 is a high-severity vulnerability in Microsoft Windows, classified under Uncontrolled Search Path Element. CVSS score: 8.8/10. Published 2021-03-23.

How severe is CVE-2021-28822?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Windows

CVE-2021-28822

The Enterprise Message Service Server (tibemsd), Enterprise Message Service Central Administration (tibemsca), Enterprise Message Service JSON configuration generator (tibemsconf2json), and Enterprise Message Service C API components of TIBCO Software Inc.'s TIBCO Enterprise Message Service, TIBCO Enterprise Message Service - Community Edition, and TIBCO Enterprise Message Service - Developer Edition contain a vulnerability that theoretically allows a low privileged attacker with local access on the Windows operating system to insert malicious software. The affected component can be abused to execute the malicious software inserted by the attacker with the elevated privileges of the component. This vulnerability results from the affected component searching for run-time artifacts outside of the installation hierarchy. Affected releases are TIBCO Software Inc.'s TIBCO Enterprise Message Service: versions 8.5.1 and below, TIBCO Enterprise Message Service - Community Edition: versions 8.5.1 and below, and TIBCO Enterprise Message Service - Developer Edition: versions 8.5.1 and below.

Published 2021-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Microsoft Windows
Tibco Enterprise Message Service
Tibco Software Inc. Enterprise Message Service — versions unspecified
Tibco Software Inc. Enterprise Message Service - Community Edition — versions unspecified
Tibco Software Inc. Enterprise Message Service - Developer Edition — versions unspecified

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

www.tibco.com/services/support/advisories (Vendor Advisory)

Frequently asked questions

What is CVE-2021-28822?: CVE-2021-28822 is a high-severity vulnerability in Microsoft Windows, classified under Uncontrolled Search Path Element. CVSS score: 8.8/10. Published 2021-03-23.
How severe is CVE-2021-28822?: High severity. CVSS v3 base score is 8.8 out of 10.