CVE-2026-20198Network attack vector

Browser script execution via insufficient input validation

Published Aug 5, 2026 · Updated Aug 5, 2026

Cross-site scripting in Cisco IMC web interfaces allows remote authenticated users to execute script code through a crafted link. The web-based management interface insufficiently validates user input from that link before processing it in the targeted browser. Exploitation requires high-privilege authentication and user interaction and can expose browser-based information or run code in the user's browser.

CVSS severity4.8
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 IMC web interfaces allows remote authenticated users to execute script code through a crafted link. The web-based management interface insufficiently validates user input from that link before processing it in the targeted browser. Exploitation requires high-privilege authentication and user interaction and can expose browser-based information or run code in the user's browser.

The record

CVE
CVE-2026-20198
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
ClamAV
Product
Cisco Enterprise NFV Infrastructure Software
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=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=4.12.7
  34. Affected versionversion=4.12.8
  35. Affected versionversion=4.13.1
  36. Affected versionversion=4.14.1
  37. Affected versionversion=4.15.1
  38. Affected versionversion=4.15.2
  39. Affected versionversion=4.15.3
  40. Affected versionversion=4.15.4
  41. Affected versionversion=4.15.5
  42. Affected versionversion=4.16.1
  43. Affected versionversion=4.18.1
  44. Affected versionversion=4.18.2
  45. Affected versionversion=4.18.2a
  46. Affected versionversion=4.2.1
  47. Affected versionversion=4.2.2
  48. Affected versionversion=4.4.1
  49. Affected versionversion=4.4.2
  50. Affected versionversion=4.4.3
  51. Affected versionversion=4.5.1
  52. Affected versionversion=4.6.1
  53. Affected versionversion=4.6.2
  54. Affected versionversion=4.6.2-FC2
  55. Affected versionversion=4.6.2-FC3
  56. Affected versionversion=4.6.3
  57. Affected versionversion=4.6.3-FC4
  58. Affected versionversion=4.6.4
  59. Affected versionversion=4.6.5-ES1
  60. Affected versionversion=4.7.1
  61. Affected versionversion=4.8.1
  62. Affected versionversion=4.8.2
  63. Affected versionversion=4.9.1
  64. Affected versionversion=4.9.2
  65. Affected versionversion=4.9.2-FC5
  66. Affected versionversion=4.9.3
  67. Affected versionversion=4.9.4
  68. Affected versionversion=4.9.4-ES8
  69. Affected versionversion=4.9.4-ES9
  70. Affected versionversion=4.9.4-FC3
  71. Affected versionversion=4.9.5
  72. Affected versionversion=4.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

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=4.12.7; version=4.12.8; 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=4.15.5; 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(2k); version=4.0(2l); version=4.0(2m); 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(4j); 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(3g); 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(3k); version=4.2(3l); version=4.2(3m); version=4.2(3n); version=4.2(3o); version=4.2(3p); version=4.2(3q); 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(2.260007); version=4.3(3.240022); version=4.3(3.240041); 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=4.3(6.260017); version=4.3(6.260033); 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); version=6.0(2.260044); version=6.0(2.260069)
ClamAV · Cisco Unified Computing System E-Series Software (UCSE)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=3.2.17.1; 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; version=4.15.3

Published CVSS scores

4.8Cisco PSIRTCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious 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

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Your stack

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