CVE-2026-20223

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-20. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
10.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 10.0Exploit: NoneExposed: 0

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

A vulnerability in the access validation of internal REST APIs of Cisco Secure Workload could allow an unauthenticated, remote attacker to access site resources with the privileges of the Site Admin role. This vulnerability is due to insufficient validation and authentication when accessing REST API endpoints. An attacker could exploit this vulnerability if they are able to send a crafted API request to an affected endpoint. A successful exploit could allow the attacker to read sensitive information and make configuration changes across tenant boundaries with the privileges of the Site Admin user. 

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
53.4%
KEV
Not listed

Published

May 20, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
No patch confirmed yet.
generic

Cisco Secure Workload Unauthorized API Access Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-csw-pnbsa-g8WEnuy

Vendor Advisories for CVE-2026-20223(2)

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 9× in last 7d / 111× 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 310 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20223?
CVE-2026-20223 is a critical vulnerability published on May 20, 2026. A vulnerability in the access validation of internal REST APIs of Cisco Secure Workload could allow an unauthenticated, remote attacker to access site resources with the privileges of the Site Admin role. This vulnerability is due to insufficient validation and authentication when…
When was CVE-2026-20223 disclosed?
CVE-2026-20223 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20223 actively exploited?
CVE-2026-20223 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 53.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-20223?
CVE-2026-20223 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-20223?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20223, 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.

Dependency Blast Radius

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