CVE-2021-41550: Leostream Connection Broker 9.0.40.17 allows administrator to upload and execute Perl code.

This month

HIGH 7.2DOWNGRADE

CVE-2021-41550 is a high-severity flaw (CVSS 7.2) affecting connection broker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Leostream Connection Broker 9.0.40.17 allows administrator to upload and execute Perl code.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-434
Published	2022-01-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: leostream

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-18 15:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

leostream connection broker DOWNGRADE

Affected: 9.0.40.17

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0.40.17

1. Check installed version

apt-cache policy connection-broker || rpm -q connection-broker || connection-broker --version

2. No fixed release: DOWNGRADE to a release before 9.0.40.17 (Debian / Ubuntu)

apt-cache madison connection-broker sudo apt install connection-broker=<VERSION_BEFORE_9.0.40.17> sudo apt-mark hold connection-broker

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list connection-broker sudo dnf downgrade connection-broker-<VERSION_BEFORE_9.0.40.17> sudo dnf versionlock add connection-broker

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-41550?

connection broker: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-41550 being exploited?

CVE-2021-41550 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-41550 affect?

CVE-2021-41550 affects connection broker. Severity is high (CVSS 7.2). Leostream Connection Broker 9.0.40.17 allows administrator to upload and execute Perl code.

How urgent is CVE-2021-41550?

Priority 41/100. High severity

Software pages

Perl vulnerabilities

Related CVEs

CVE-2021-41551 MEDIUM 4.9 DOWNGRADE Leostream Connection Broker 9.0.40.17 allows administrators to conduct directory traversal attacks by uploadin
CVE-2021-38157 MEDIUM 6.1 UPGRADE LeoStream Connection Broker 9.x before 9.0.34.3 allows Unauthenticated Reflected XSS via the /index.pl user pa

References

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