Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-28817

23
FAUCET Score

CVE-2021-28817 is a local privilege escalation vulnerability affecting TIBCO Rendezvous and Rendezvous Developer Edition versions 8.5.1 and below on Windows. A low-privileged attacker can insert malicious software due to insufficient access restrictions on installation files/folders, leading to execution with elevated privileges. This vulnerability has a CVSS score of 7.8 (High), indicating high impact on confidentiality, integrity, and availability with low attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.5.1CPE matchmatch criteria
cpe:2.3:a:tibco:rendezvous:*:*:*:*:*:*:*:*
<= 8.5.1CPE matchmatch criteria
cpe:2.3:a:tibco:rendezvous:*:*:*:*:developer:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.0
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.25%
Probability of exploitation in next 30 days
EPSS Percentile
16.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0025 is in the 51st percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

tibco.com / services/support/advisories
Vendor Advisory