CVE-2026-20060Network attack vector

Open redirect via unvalidated HTTP parameters

Published Apr 15, 2026 · Updated Apr 15, 2026

Open redirect in Cisco Unity Connection 14 through 14SU4 and 15 through 15SU3 allows remote attackers to redirect users via crafted links. The web-based management interface fails to validate an HTTP request parameter before using it as a redirect destination. Exploitation requires no authentication but requires a target to follow the link; the resulting navigation changes browser location without reported data access or service interruption.

CVSS severity4.7
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Open redirect in Cisco Unity Connection 14 through 14SU4 and 15 through 15SU3 allows remote attackers to redirect users via crafted links. The web-based management interface fails to validate an HTTP request parameter before using it as a redirect destination. Exploitation requires no authentication but requires a target to follow the link; the resulting navigation changes browser location without reported data access or service interruption.

The record

CVE
CVE-2026-20060
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
ClamAV
Product
Cisco Unity Connection
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=14
  2. Affected versionversion=14SU1
  3. Affected versionversion=14SU2
  4. Affected versionversion=14SU3
  5. Affected versionversion=14SU3a
  6. Affected versionversion=14SU4
  7. Affected versionversion=15
  8. Affected versionversion=15SU1
  9. Affected versionversion=15SU2
  10. Affected versionversion=15SU3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unity Connectionversion=14; version=14SU1; version=14SU2; version=14SU3; version=14SU3a; version=14SU4; version=15; version=15SU1; version=15SU2; version=15SU3

Published CVSS scores

4.7CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo