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CVE-2021-41551

19
FAUCET Score

CVE-2021-41551 describes a directory traversal vulnerability in Leostream Connection Broker version 9.0.40.17, allowing authenticated administrators to upload a ZIP file containing a symbolic link to traverse directories. This vulnerability has a CVSS score of 4.9 (Medium), indicating a network-based attack with high impact on confidentiality but requiring high privileges and no user interaction. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and there is no evidence of active exploitation or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
9.0.40.17CPE matchmatch criteria
cpe:2.3:a:leostream:connection_broker:9.0.40.17:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.27%
Probability of exploitation in next 30 days
EPSS Percentile
66.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0127 is in the 74th percentile among its peer group of 3,565 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

leostream.com / wp-content/uploads/2018/11/Leostream_release_notes.pdf
Release NotesVendor Advisory
leostream.com / resource/leostream-connection-broker-9-0
Release NotesVendor Advisory