PT-2026-37648 · Cisco · Cisco Unity Connection

Jahmel Harris · Published 2026-05-06 · Updated 2026-05-14 · CVE-2026-20034

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Cisco Unity Connection (affected versions not specified)

Description Insufficient validation of user-supplied input in the web-based management interface allows an authenticated remote attacker to execute arbitrary code as root. This is achieved by submitting a crafted API request, which could lead to the complete compromise of the device. Valid user credentials are required for exploitation.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-35

Related Identifiers

BDU:2026-06544

CVE-2026-20034

Affected Products

Cisco Unity Connection

References · 10

• https://bdu.fstec.ru/vul/2026-06544 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-unity-rce-ssrf-hENhuASy · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20034 · Security Note
• https://reddit.com/r/pwnhub/comments/1t6ar4i/cisco_patches_critical_vulnerabilities_in_key · Reddit Post
• https://twitter.com/nims213/status/2052350898932740360 · Twitter Post
• https://twitter.com/CVEnew/status/2052086715213570057 · Twitter Post
• https://twitter.com/CCBalert/status/2052773306579742868 · Twitter Post
• https://twitter.com/autumn_good_35/status/2052388162387980635 · Twitter Post
• https://twitter.com/the_yellow_fall/status/2052360296099168257 · Twitter Post
• https://twitter.com/uwillc/status/2054872405126840546 · Twitter Post