CVE-2026-20246: A vulnerability in the vmadmin CLI of Cisco Umbrella Virtual Appliance could allow an authenticated, local att

Q: How do I fix CVE-2026-20246?

umbrella virtual appliance: upgrade to 3.8.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-20246 being exploited?

CVE-2026-20246 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-20246 affect?

CVE-2026-20246 affects umbrella virtual appliance. Severity is medium (CVSS 6.0). A vulnerability in the vmadmin CLI of Cisco Umbrella Virtual Appliance could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied comman

Q: How urgent is CVE-2026-20246?

Priority 21/100. No elevated risk signals yet.

Routine

MEDIUM 6.0UPGRADE

CVE-2026-20246 is a medium-severity flaw (CVSS 6.0) affecting umbrella virtual appliance. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the vmadmin CLI of Cisco Umbrella Virtual Appliance could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied commands. An attacker with vmadmin privileges could exploit this vulnerability by using certain commands at the CLI. A successful exploit could allow the attacker to elevate privileges to root.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-269
Published	2026-06-17
Last modified	2026-10-26

Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-17 17:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

cisco umbrella virtual appliance UPGRADE

Affected: < 3.8.5

Fixed in: 3.8.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy umbrella-virtual-appliance || rpm -q umbrella-virtual-appliance || umbrella-virtual-appliance --version

2. UPGRADE to 3.8.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade umbrella-virtual-appliance

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade umbrella-virtual-appliance

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-20246?

umbrella virtual appliance: upgrade to 3.8.5. Exact commands for each OS are on this page.

Is CVE-2026-20246 being exploited?

CVE-2026-20246 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-2026-20246 affect?

CVE-2026-20246 affects umbrella virtual appliance. Severity is medium (CVSS 6.0). A vulnerability in the vmadmin CLI of Cisco Umbrella Virtual Appliance could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of user-supplied comman

How urgent is CVE-2026-20246?

Priority 21/100. No elevated risk signals yet.

Software pages

Cisco vulnerabilities

References

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