CVE-2026-20078Network attack vector

Authenticated file download via unsanitized path input

Published Apr 15, 2026 · Updated Apr 15, 2026

Path traversal in Cisco Unity Connection allows remote authenticated users with administrative credentials to download arbitrary files over HTTPS. The web-based management interface fails to sanitize user-supplied path input before resolving a requested file, allowing retrieval outside the intended location. Valid administrative credentials are required, and the reported impact is file disclosure without modification or service interruption.

CVSS severity6.5
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Cisco Unity Connection allows remote authenticated users with administrative credentials to download arbitrary files over HTTPS. The web-based management interface fails to sanitize user-supplied path input before resolving a requested file, allowing retrieval outside the intended location. Valid administrative credentials are required, and the reported impact is file disclosure without modification or service interruption.

The record

CVE
CVE-2026-20078
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
ClamAV
Product
Cisco Unity Connection
Classifications
CWE-23, T1005
Attack vector
network
Privileges
admin

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

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Is a vulnerable build present?

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

  1. Affected versionversion=12.5(1)
  2. Affected versionversion=12.5(1)SU1
  3. Affected versionversion=12.5(1)SU2
  4. Affected versionversion=12.5(1)SU3
  5. Affected versionversion=12.5(1)SU4
  6. Affected versionversion=12.5(1)SU5
  7. Affected versionversion=12.5(1)SU6
  8. Affected versionversion=12.5(1)SU7
  9. Affected versionversion=12.5(1)SU8
  10. Affected versionversion=12.5(1)SU8a
  11. Affected versionversion=12.5(1)SU9
  12. Affected versionversion=14
  13. Affected versionversion=14SU1
  14. Affected versionversion=14SU2
  15. Affected versionversion=14SU3
  16. Affected versionversion=14SU3a
  17. Affected versionversion=14SU4
  18. Affected versionversion=14SU5
  19. Affected versionversion=15
  20. Affected versionversion=15SU1
  21. Affected versionversion=15SU2
  22. Affected versionversion=15SU3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ClamAV · Cisco Unity Connectionversion=12.5(1); version=12.5(1)SU1; version=12.5(1)SU2; version=12.5(1)SU3; version=12.5(1)SU4; version=12.5(1)SU5; version=12.5(1)SU6; version=12.5(1)SU7; version=12.5(1)SU8; version=12.5(1)SU8a; version=12.5(1)SU9; version=14; version=14SU1; version=14SU2; version=14SU3; version=14SU3a; version=14SU4; version=14SU5; version=15; version=15SU1; version=15SU2; version=15SU3

Published CVSS scores

6.5CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
T1005Data from Local System

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

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Your stack

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