CVE-2026-20034

HIGHCVSS 8.8/10EPSS 0.70%

Last modified

CVE-2026-20034 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

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 complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.70%

48.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoUnity Connection< 14.0
CiscoUnity Connection14.0
CiscoUnity Connection14su1
CiscoUnity Connection14su2
CiscoUnity Connection14su3
CiscoUnity Connection14su4
CiscoUnity Connection15.0
CiscoUnity Connection15su1
CiscoUnity Connection15su2
CiscoUnity Connection15su3

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-20034?
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 complete compromise of a targeted device.&nbsp;To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
How severe is CVE-2026-20034?
CVE-2026-20034 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.
How do I fix CVE-2026-20034?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

Are you affected by CVE-2026-20034?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST