CVE-2026-20172

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-05-06. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent. This vulnerability is due to inadequate validation of file contents during file upload operations. An attacker could exploit this vulnerability by uploading a file that contains malicious scripts or HTML code, which the application could make available to other users to access. A successful exploit could allow the attacker to execute the contents of that file in the browser of a user and conduct browser-based attacks. 

CVSS v3
4.3
EG Score
4.3(medium)
EPSS
2.6%
KEV
Not listed

Published

May 6, 2026

Last Modified

May 6, 2026

References (1)

Vendor Advisories for CVE-2026-20172(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-08 15:15 UTCEPSS rescore
  5. 2026-07-07 13:46 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-01 15:06 UTCEPSS rescore
  9. 2026-07-01 15:06 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-27 03:08 UTCEPSS rescore
  15. 2026-06-25 13:49 UTCEPSS rescore
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:32 UTCEPSS rescore
  18. 2026-06-22 14:25 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
  20. 2026-06-21 14:56 UTCEPSS rescore
  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 01:59 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:25 UTCEPSS rescore
  25. 2026-06-18 17:52 UTCEPSS rescore
Show 75 more
  1. 2026-06-17 17:53 UTCEPSS rescore
  2. 2026-06-16 17:52 UTCEPSS rescore
  3. 2026-06-15 17:48 UTCEPSS rescore
  4. 2026-06-15 06:53 UTCEG score recompute
  5. 2026-06-15 06:53 UTCGHSA enrichment
  6. 2026-06-14 23:18 UTCEPSS rescore
  7. 2026-06-14 07:29 UTCEG score recompute
  8. 2026-06-14 07:29 UTCGHSA enrichment
  9. 2026-06-13 23:00 UTCEPSS rescore
  10. 2026-06-13 23:00 UTCEPSS rescore
  11. 2026-06-13 01:47 UTCEG score recompute
  12. 2026-06-13 01:47 UTCGHSA enrichment
  13. 2026-06-12 23:12 UTCEPSS rescore
  14. 2026-06-12 02:22 UTCEG score recompute
  15. 2026-06-12 02:22 UTCGHSA enrichment
  16. 2026-06-11 14:00 UTCEPSS rescore
  17. 2026-06-11 03:01 UTCEG score recompute
  18. 2026-06-11 03:01 UTCGHSA enrichment
  19. 2026-06-10 22:18 UTCEPSS rescore
  20. 2026-06-10 13:22 UTCEPSS rescore
  21. 2026-06-10 03:40 UTCEG score recompute
  22. 2026-06-10 03:40 UTCGHSA enrichment
  23. 2026-06-09 04:19 UTCEG score recompute
  24. 2026-06-09 04:19 UTCGHSA enrichment
  25. 2026-06-08 14:17 UTCEPSS rescore
  26. 2026-06-08 14:17 UTCEPSS rescore
  27. 2026-06-08 04:57 UTCEG score recompute
  28. 2026-06-08 04:57 UTCGHSA enrichment
  29. 2026-06-07 15:25 UTCEPSS rescore
  30. 2026-06-07 15:24 UTCEPSS rescore
  31. 2026-06-07 05:36 UTCEG score recompute
  32. 2026-06-07 05:36 UTCGHSA enrichment
  33. 2026-06-06 13:47 UTCEPSS rescore
  34. 2026-06-06 13:47 UTCEPSS rescore
  35. 2026-06-06 13:47 UTCEPSS rescore
  36. 2026-06-06 06:14 UTCEG score recompute
  37. 2026-06-06 06:14 UTCGHSA enrichment
  38. 2026-06-05 22:47 UTCEPSS rescore
  39. 2026-06-05 06:52 UTCEG score recompute
  40. 2026-06-05 06:52 UTCGHSA enrichment
  41. 2026-06-05 06:10 UTCEPSS rescore
  42. 2026-06-05 06:10 UTCEPSS rescore
  43. 2026-06-04 13:12 UTCEPSS rescore
  44. 2026-06-04 13:12 UTCEPSS rescore
  45. 2026-06-04 13:12 UTCEPSS rescore
  46. 2026-06-04 07:31 UTCEG score recompute
  47. 2026-06-04 07:31 UTCGHSA enrichment
  48. 2026-06-03 08:09 UTCEG score recompute
  49. 2026-06-03 08:09 UTCGHSA enrichment
  50. 2026-06-02 20:13 UTCEPSS rescore
  51. 2026-06-02 20:13 UTCEPSS rescore
  52. 2026-06-02 08:48 UTCEG score recompute
  53. 2026-06-02 08:48 UTCGHSA enrichment
  54. 2026-06-01 13:51 UTCEPSS rescore
  55. 2026-06-01 13:51 UTCEPSS rescore
  56. 2026-06-01 13:51 UTCEPSS rescore
  57. 2026-06-01 09:27 UTCEG score recompute
  58. 2026-06-01 09:27 UTCGHSA enrichment
  59. 2026-05-31 22:30 UTCEPSS rescore
  60. 2026-05-31 22:30 UTCEPSS rescore
  61. 2026-05-31 00:16 UTCEPSS rescore
  62. 2026-05-31 00:16 UTCEPSS rescore
  63. 2026-05-31 00:16 UTCEPSS rescore
  64. 2026-05-29 13:44 UTCEPSS rescore
  65. 2026-05-29 13:44 UTCEPSS rescore
  66. 2026-05-28 13:44 UTCEPSS rescore
  67. 2026-05-28 13:44 UTCEPSS rescore
  68. 2026-05-28 13:44 UTCEPSS rescore
  69. 2026-05-27 13:40 UTCEPSS rescore
  70. 2026-05-27 13:40 UTCEPSS rescore
  71. 2026-05-27 13:40 UTCEPSS rescore
  72. 2026-05-26 13:44 UTCEPSS rescore
  73. 2026-05-26 13:44 UTCEPSS rescore
  74. 2026-05-26 07:18 UTCEPSS rescore
  75. 2026-05-26 07:18 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-20172?
CVE-2026-20172 is a medium vulnerability published on May 6, 2026. A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent. This…
When was CVE-2026-20172 disclosed?
CVE-2026-20172 was first published in the National Vulnerability Database on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20172 actively exploited?
CVE-2026-20172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-20172?
CVE-2026-20172 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-20172?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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