CVE-2026-20085Network attack vector

Reflected XSS via unvalidated management-interface input

Published Apr 1, 2026 · Updated Apr 1, 2026

Reflected XSS in the Cisco IMC web-based management interface allows remote attackers to execute browser script through a crafted link. The interface fails to validate user-controlled input before returning it in a page, causing a crafted request to be reflected into the targeted user's browser. Exploitation requires the user to open the attacker-supplied link; resulting script runs in that user's browser context and can access browser-based information.

CVSS severity6.1
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the Cisco IMC web-based management interface allows remote attackers to execute browser script through a crafted link. The interface fails to validate user-controlled input before returning it in a page, causing a crafted request to be reflected into the targeted user's browser. Exploitation requires the user to open the attacker-supplied link; resulting script runs in that user's browser context and can access browser-based information.

The record

CVE
CVE-2026-20085
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
ClamAV
Product
Cisco Enterprise NFV Infrastructure Software
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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=3.10.1
  2. Affected versionversion=3.10.2
  3. Affected versionversion=3.10.3
  4. Affected versionversion=3.11.1
  5. Affected versionversion=3.11.2
  6. Affected versionversion=3.11.3
  7. Affected versionversion=3.12.1
  8. Affected versionversion=3.12.1a
  9. Affected versionversion=3.12.1b
  10. Affected versionversion=3.12.2
  11. Affected versionversion=3.12.3
  12. Affected versionversion=3.3.1
  13. Affected versionversion=3.4.1
  14. Affected versionversion=3.5.1
  15. Affected versionversion=3.5.2
  16. Affected versionversion=3.6.1
  17. Affected versionversion=3.6.2
  18. Affected versionversion=3.6.3
  19. Affected versionversion=3.7.1
  20. Affected versionversion=3.8.1
  21. Affected versionversion=3.9.1
  22. Affected versionversion=3.9.2
  23. Affected versionversion=4.10.1
  24. Affected versionversion=4.1.1
  25. Affected versionversion=4.11.1
  26. Affected versionversion=4.1.2
  27. Affected versionversion=4.12.1
  28. Affected versionversion=4.12.2
  29. Affected versionversion=4.12.3
  30. Affected versionversion=4.12.4
  31. Affected versionversion=4.12.5
  32. Affected versionversion=4.12.6
  33. Affected versionversion=4.13.1
  34. Affected versionversion=4.14.1
  35. Affected versionversion=4.15.1
  36. Affected versionversion=4.15.2
  37. Affected versionversion=4.15.3
  38. Affected versionversion=4.15.4
  39. Affected versionversion=4.16.1
  40. Affected versionversion=4.18.1
  41. Affected versionversion=4.18.2
  42. Affected versionversion=4.18.2a
  43. Affected versionversion=4.2.1
  44. Affected versionversion=4.2.2
  45. Affected versionversion=4.4.1
  46. Affected versionversion=4.4.2
  47. Affected versionversion=4.4.3
  48. Affected versionversion=4.5.1
  49. Affected versionversion=4.6.1
  50. Affected versionversion=4.6.2
  51. Affected versionversion=4.6.2-FC2
  52. Affected versionversion=4.6.2-FC3
  53. Affected versionversion=4.6.3
  54. Affected versionversion=4.6.3-FC4
  55. Affected versionversion=4.6.4
  56. Affected versionversion=4.6.5-ES1
  57. Affected versionversion=4.7.1
  58. Affected versionversion=4.8.1
  59. Affected versionversion=4.8.2
  60. Affected versionversion=4.9.1
  61. Affected versionversion=4.9.2
  62. Affected versionversion=4.9.2-FC5
  63. Affected versionversion=4.9.3
  64. Affected versionversion=4.9.4
  65. Affected versionversion=4.9.4-ES8
  66. Affected versionversion=4.9.4-ES9
  67. Affected versionversion=4.9.4-FC3
  68. Affected versionversion=4.9.5
  69. Affected versionversion=4.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Enterprise NFV Infrastructure Softwareversion=3.10.1; version=3.10.2; version=3.10.3; version=3.11.1; version=3.11.2; version=3.11.3; version=3.12.1; version=3.12.1a; version=3.12.1b; version=3.12.2; version=3.12.3; version=3.3.1; version=3.4.1; version=3.5.1; version=3.5.2; version=3.6.1; version=3.6.2; version=3.6.3; version=3.7.1; version=3.8.1; version=3.9.1; version=3.9.2; version=4.10.1; version=4.1.1; version=4.11.1; version=4.1.2; version=4.12.1; version=4.12.2; version=4.12.3; version=4.12.4; version=4.12.5; version=4.12.6; version=4.13.1; version=4.14.1; version=4.15.1; version=4.15.2; version=4.15.3; version=4.15.4; version=4.16.1; version=4.18.1; version=4.18.2; version=4.18.2a; version=4.2.1; version=4.2.2; version=4.4.1; version=4.4.2; version=4.4.3; version=4.5.1; version=4.6.1; version=4.6.2; version=4.6.2-FC2; version=4.6.2-FC3; version=4.6.3; version=4.6.3-FC4; version=4.6.4; version=4.6.5-ES1; version=4.7.1; version=4.8.1; version=4.8.2; version=4.9.1; version=4.9.2; version=4.9.2-FC5; version=4.9.3; version=4.9.4; version=4.9.4-ES8; version=4.9.4-ES9; version=4.9.4-FC3; version=4.9.5; version=4.9.6
ClamAV · Cisco Unified Computing System (Standalone)version=3.1(1d); version=3.1(2b); version=3.1(2c); version=3.1(2d); version=3.1(2e); version=3.1(2g); version=3.1(2i); version=3.1(3a); version=3.1(3b); version=3.1(3c); version=3.1(3d); version=3.1(3g); version=3.1(3h); version=3.1(3i); version=3.1(3j); version=3.1(3k); version=4.0(1.240); version=4.0(1a); version=4.0(1b); version=4.0(1c); version=4.0(1d); version=4.0(1e); version=4.0(1g); version=4.0(1h); version=4.0(2c); version=4.0(2d); version=4.0(2f); version=4.0(2g); version=4.0(2h); version=4.0(2i); version=4.0(2l); version=4.0(2n); version=4.0(2o); version=4.0(2p); version=4.0(2q); version=4.0(2r); version=4.0(4b); version=4.0(4c); version=4.0(4d); version=4.0(4e); version=4.0(4f); version=4.0(4h); version=4.0(4i); version=4.0(4k); version=4.0(4l); version=4.0(4m); version=4.0(4n); version=4.1(1c); version=4.1(1d); version=4.1(1f); version=4.1(1g); version=4.1(1h); version=4.1(2a); version=4.1(2b); version=4.1(2d); version=4.1(2e); version=4.1(2f); version=4.1(2g); version=4.1(2h); version=4.1(2j); version=4.1(2k); version=4.1(2l); version=4.1(2m); version=4.1(3b); version=4.1(3c); version=4.1(3d); version=4.1(3f); version=4.1(3h); version=4.1(3i); version=4.1(3l); version=4.1(3m); version=4.1(3n); version=4.2(1a); version=4.2(1b); version=4.2(1c); version=4.2(1e); version=4.2(1f); version=4.2(1g); version=4.2(1i); version=4.2(1j); version=4.2(2a); version=4.2(2f); version=4.2(2g); version=4.2(3b); version=4.2(3d); version=4.2(3e); version=4.2(3g); version=4.2(3h); version=4.2(3i); version=4.2(3j); version=4.2(3l); version=4.2(3m); version=4.2(3n); version=4.2(3o); version=4.2(3p); version=4.3(1.230097); version=4.3(1.230124); version=4.3(1.230138); version=4.3(2.230207); version=4.3(2.230270); version=4.3(2.240002); version=4.3(2.240009); version=4.3(2.240037); version=4.3(2.240053); version=4.3(2.240077); version=4.3(2.240090); version=4.3(2.240107); version=4.3(2.250016); version=4.3(2.250021); version=4.3(2.250022); version=4.3(2.250037); version=4.3(2.250045); version=4.3(2.250063); version=4.3(3.240022); version=4.3(3.240043); version=4.3(4.240142); version=4.3(4.240152); version=4.3(4.241014); version=4.3(4.241063); version=4.3(4.242028); version=4.3(4.242038); version=4.3(4.242066); version=4.3(4.252001); version=4.3(4.252002); version=4.3(5.240021); version=4.3(5.250001); version=4.3(5.250030); version=4.3(5.250033); version=4.3(5.250043); version=4.3(5.250045); version=4.3(6.250039); version=4.3(6.250040); version=4.3(6.250044); version=4.3(6.250053); version=4.3(6.250060); version=4.3(6.250101); version=4.3(6.250117); version=4.3(6.260003); version=6.0(1.250127); version=6.0(1.250130); version=6.0(1.250131); version=6.0(1.250174); version=6.0(1.250192); version=6.0(1.250194)
ClamAV · Cisco Unified Computing System E-Series Software (UCSE)version=2.0.0; version=2.1.0; version=2.2.1; version=2.2.2; version=2.3.1; version=2.3.2; version=2.3.3; version=2.3.5; version=2.4.0; version=2.4.1; version=2.4.2; version=3.0.1; version=3.0.2; version=3.1.0; version=3.1.1; version=3.1.2; version=3.1.3; version=3.1.4; version=3.1.5; version=3.2.1; version=3.2.10; version=3.2.11.1; version=3.2.11.3; version=3.2.11.5; version=3.2.12.2; version=3.2.13.6; version=3.2.14; version=3.2.15; version=3.2.15.3; version=3.2.16.1; version=3.2.2; version=3.2.3; version=3.2.4; version=3.2.6; version=3.2.7; version=3.2.8; version=4.00; version=4.02; version=4.11.1; version=4.12.1; version=4.12.2; version=4.15.2

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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