CVE-2026-20034: A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated,

Q: How do I fix CVE-2026-20034?

unity connection: upgrade to 14.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-20034 being exploited?

CVE-2026-20034 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-2026-20034 affect?

CVE-2026-20034 affects unity connection. Severity is high (CVSS 8.8). A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-s

This month

HIGH 8.8UPGRADE

CVE-2026-20034 is a high-severity flaw (CVSS 8.8) affecting unity connection. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the comple

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-35
Published	2026-05-06
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

2026-05-06 17:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

cisco unity connection UPGRADE

Affected: < 14.0 · 14.0 · 14su1 · 14su2 · 14su3 · 14su4 · 15.0 · 15su1

Fixed in: 14.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 14.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade unity-connection

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade unity-connection

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-2026-20034?

unity connection: upgrade to 14.0. Exact commands for each OS are on this page.

Is CVE-2026-20034 being exploited?

CVE-2026-20034 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-2026-20034 affect?

CVE-2026-20034 affects unity connection. Severity is high (CVSS 8.8). A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-s

How urgent is CVE-2026-20034?

Priority 44/100. High severity

Software pages

Cisco vulnerabilities · Unity vulnerabilities

Related CVEs

CVE-2026-20035 HIGH 7.2 UPGRADE A vulnerability in the web UI of Cisco Unity Connection Web Inbox could allow an unauthenticated, remote attac
CVE-2026-20078 MEDIUM 6.5 UPGRADE Multiple vulnerabilities in Cisco Unity Connection could allow an authenticated, remote attacker to downl

References

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