CVE-2026-20116Network attack vector

Cross-site scripting via insufficient page input validation

Published Mar 11, 2026 · Updated Mar 11, 2026

Cross-site scripting in Cisco Unified Contact Center Express allows remote attackers to run script in an interface user's browser. The bundled Cisco Finesse and Unified Intelligence Center web interfaces insufficiently validate input injected into specific pages, so the browser treats attacker-supplied code as interface content. Exploitation requires an interface user to load the crafted content; successful code runs in that interface context and can read sensitive browser-based information, while the same input path also permits SSRF or an open redirect.

CVSS severity6.1
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Cisco Unified Contact Center Express allows remote attackers to run script in an interface user's browser. The bundled Cisco Finesse and Unified Intelligence Center web interfaces insufficiently validate input injected into specific pages, so the browser treats attacker-supplied code as interface content. Exploitation requires an interface user to load the crafted content; successful code runs in that interface context and can read sensitive browser-based information, while the same input path also permits SSRF or an open redirect.

The record

CVE
CVE-2026-20116
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
ClamAV
Product
Cisco Unified Contact Center Express
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=10.5(1)
  2. Affected versionversion=10.5(1)SU1
  3. Affected versionversion=10.5(1)SU1ES10
  4. Affected versionversion=10.6(1)
  5. Affected versionversion=10.6(1)SU1
  6. Affected versionversion=10.6(1)SU2
  7. Affected versionversion=10.6(1)SU2ES04
  8. Affected versionversion=10.6(1)SU3
  9. Affected versionversion=10.6(1)SU3ES01
  10. Affected versionversion=10.6(1)SU3ES02
  11. Affected versionversion=10.6(1)SU3ES03
  12. Affected versionversion=11.0(1)SU1
  13. Affected versionversion=11.0(1)SU1ES02
  14. Affected versionversion=11.0(1)SU1ES03
  15. Affected versionversion=11.5(1)ES01
  16. Affected versionversion=11.5(1)SU1
  17. Affected versionversion=11.5(1)SU1ES01
  18. Affected versionversion=11.5(1)SU1ES02
  19. Affected versionversion=11.5(1)SU1ES03
  20. Affected versionversion=11.6(1)
  21. Affected versionversion=11.6(1)ES01
  22. Affected versionversion=11.6(1)ES02
  23. Affected versionversion=11.6(2)
  24. Affected versionversion=11.6(2)ES01
  25. Affected versionversion=11.6(2)ES02
  26. Affected versionversion=11.6(2)ES03
  27. Affected versionversion=11.6(2)ES04
  28. Affected versionversion=11.6(2)ES05
  29. Affected versionversion=11.6(2)ES06
  30. Affected versionversion=11.6(2)ES07
  31. Affected versionversion=11.6(2)ES08
  32. Affected versionversion=12.0(1)
  33. Affected versionversion=12.0(1)ES01
  34. Affected versionversion=12.0(1)ES02
  35. Affected versionversion=12.0(1)ES03
  36. Affected versionversion=12.0(1)ES04
  37. Affected versionversion=12.5(1)
  38. Affected versionversion=12.5(1)ES01
  39. Affected versionversion=12.5(1)ES02
  40. Affected versionversion=12.5(1)ES03
  41. Affected versionversion=12.5(1)_SU01_ES01
  42. Affected versionversion=12.5(1)_SU01_ES02
  43. Affected versionversion=12.5(1)_SU01_ES03
  44. Affected versionversion=12.5(1)_SU02_ES01
  45. Affected versionversion=12.5(1)_SU02_ES02
  46. Affected versionversion=12.5(1)_SU02_ES03
  47. Affected versionversion=12.5(1)_SU02_ES04
  48. Affected versionversion=12.5(1)_SU03_ES01
  49. Affected versionversion=12.5(1)_SU03_ES02
  50. Affected versionversion=12.5(1)_SU03_ES03
  51. Affected versionversion=12.5(1)_SU03_ES04
  52. Affected versionversion=12.5(1)_SU03_ES05
  53. Affected versionversion=12.5(1)_SU03_ES06
  54. Affected versionversion=12.5(1)_SU03_ES07
  55. Affected versionversion=12.5(1)SU1
  56. Affected versionversion=12.5(1)SU2
  57. Affected versionversion=12.5(1)SU3
  58. Affected versionversion=15.0(1)
  59. Affected versionversion=15.0(1)ES01
  60. Affected versionversion=1501_ES01_CSCws06843
  61. Affected versionversion=15.0(1)ES-MSOauth
  62. Affected versionversion=UCCX 15.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Unified Contact Center Expressversion=10.5(1); version=10.5(1)SU1; version=10.5(1)SU1ES10; version=10.6(1); version=10.6(1)SU1; version=10.6(1)SU2; version=10.6(1)SU2ES04; version=10.6(1)SU3; version=10.6(1)SU3ES01; version=10.6(1)SU3ES02; version=10.6(1)SU3ES03; version=11.0(1)SU1; version=11.0(1)SU1ES02; version=11.0(1)SU1ES03; version=11.5(1)ES01; version=11.5(1)SU1; version=11.5(1)SU1ES01; version=11.5(1)SU1ES02; version=11.5(1)SU1ES03; version=11.6(1); version=11.6(1)ES01; version=11.6(1)ES02; version=11.6(2); version=11.6(2)ES01; version=11.6(2)ES02; version=11.6(2)ES03; version=11.6(2)ES04; version=11.6(2)ES05; version=11.6(2)ES06; version=11.6(2)ES07; version=11.6(2)ES08; version=12.0(1); version=12.0(1)ES01; version=12.0(1)ES02; version=12.0(1)ES03; version=12.0(1)ES04; version=12.5(1); version=12.5(1)ES01; version=12.5(1)ES02; version=12.5(1)ES03; version=12.5(1)_SU01_ES01; version=12.5(1)_SU01_ES02; version=12.5(1)_SU01_ES03; version=12.5(1)_SU02_ES01; version=12.5(1)_SU02_ES02; version=12.5(1)_SU02_ES03; version=12.5(1)_SU02_ES04; version=12.5(1)_SU03_ES01; version=12.5(1)_SU03_ES02; version=12.5(1)_SU03_ES03; version=12.5(1)_SU03_ES04; version=12.5(1)_SU03_ES05; version=12.5(1)_SU03_ES06; version=12.5(1)_SU03_ES07; version=12.5(1)SU1; version=12.5(1)SU2; version=12.5(1)SU3; version=15.0(1); version=15.0(1)ES01; version=1501_ES01_CSCws06843; version=15.0(1)ES-MSOauth; version=UCCX 15.0.1

Published CVSS scores

6.1Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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