CVE-2020-11490: Manage::Certificates in Zen Load Balancer 3.10.1 allows remote authenticated admins to execute arbitrary OS co

This month

HIGH 7.2DOWNGRADE

CVE-2020-11490 is a high-severity flaw (CVSS 7.2) affecting zen load balancer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Manage::Certificates in Zen Load Balancer 3.10.1 allows remote authenticated admins to execute arbitrary OS commands via shell metacharacters in the index.cgi cert_issuer, cert_division, cert_organization, cert_locality, cert_state, cert_country, or cert_email parameter.

Why this priority

High severity
Public exploit reference

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	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-78
Published	2020-04-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zevenet

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

Am I affected?

Timeline

2020-04-02 14:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

zevenet zen load balancer DOWNGRADE

Affected: 3.10.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.10.1

1. Check installed version

apt-cache policy zen-load-balancer || rpm -q zen-load-balancer || zen-load-balancer --version

2. No fixed release: DOWNGRADE to a release before 3.10.1 (Debian / Ubuntu)

apt-cache madison zen-load-balancer sudo apt install zen-load-balancer=<VERSION_BEFORE_3.10.1> sudo apt-mark hold zen-load-balancer

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

dnf --showduplicates list zen-load-balancer sudo dnf downgrade zen-load-balancer-<VERSION_BEFORE_3.10.1> sudo dnf versionlock add zen-load-balancer

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-2020-11490?

zen load balancer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-11490 being exploited?

CVE-2020-11490 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-2020-11490 affect?

CVE-2020-11490 affects zen load balancer. Severity is high (CVSS 7.2). Manage::Certificates in Zen Load Balancer 3.10.1 allows remote authenticated admins to execute arbitrary OS commands via shell metacharacters in the index.cgi cert_issuer, cert_division, cert_organization, cert_locality, cert_state, cert_co

How urgent is CVE-2020-11490?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2020-11491 MEDIUM 4.9 DOWNGRADE Monitoring::Logs in Zen Load Balancer 3.10.1 allows remote authenticated admins to conduct absolute path trave

References

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