CVE-2022-1357: The affected On-Premise cnMaestro allows an unauthenticated attacker to access the cnMaestro server and execut

This month

CRITICAL 9.8REMOTEMITIGATE

CVE-2022-1357 is a critical-severity flaw (CVSS 9.8) affecting cnmaestro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The affected On-Premise cnMaestro allows an unauthenticated attacker to access the cnMaestro server and execute arbitrary code in the privileges of the web server. This lack of validation could allow an attacker to append arbitrary data to the logger command.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-78
Published	2022-05-17
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: cambiumnetworks

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

Am I affected?

Timeline

2022-05-17 21:15 UTCPublished CVE record published
2026-06-17 04:22 UTCUpdated Record last modified

cambiumnetworks cnmaestro MITIGATE

Affected: 2.4.2 · 3.0.0 · 3.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-1357?

cnmaestro: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-1357 being exploited?

CVE-2022-1357 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-2022-1357 affect?

CVE-2022-1357 affects cnmaestro. Severity is critical (CVSS 9.8). The affected On-Premise cnMaestro allows an unauthenticated attacker to access the cnMaestro server and execute arbitrary code in the privileges of the web server. This lack of validation could allow an attacker to append arbitrary data to

How urgent is CVE-2022-1357?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2022-1362 MEDIUM 5.0 MITIGATE The affected On-Premise cnMaestro is vulnerable inside a specific route where a user can upload a crafted pack
CVE-2022-1361 HIGH 7.4 MITIGATE The affected On-Premise cnMaestro is vulnerable to a pre-auth data exfiltration through improper neutralizatio
CVE-2022-1360 HIGH 8.2 MITIGATE The affected On-Premise cnMaestro is vulnerable to execution of code on the cnMaestro hosting server
CVE-2022-1359 MEDIUM 5.7 MITIGATE The affected On-Premise cnMaestro is vulnerable to an arbitrary file-write through improper limitation of a pa
CVE-2022-1358 MEDIUM 5.9 MITIGATE The affected On-Premise is vulnerable to data exfiltration through improper neutralization of special elements

References

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