CVE-2026-20127

CRITICALNVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-02-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 10.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
10.0
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 58%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 peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to an affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric. 

CVSS v3
10.0
EG Score
10.0(high)
EPSS
99.0%
KEV
⚠ Exploited

Published

February 25, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20127
generic

Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk

Vendor Advisories for CVE-2026-20127(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 93× in last 7d / 349× 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 349 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/admin/networking/cisco_sdwan_auth_bypass✓ verified
    First seen Feb 25, 2026

    Cisco Catalyst SD-WAN Controller Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-20127?
CVE-2026-20127 is a critical vulnerability published on February 25, 2026. A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an unauthenticated, remote attacker to bypass authentication and…
When was CVE-2026-20127 disclosed?
CVE-2026-20127 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20127 actively exploited?
Yes. CISA added CVE-2026-20127 to the Known Exploited Vulnerabilities catalog on February 25, 2026, affecting Cisco Catalyst SD-WAN Controller and Manager. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-20127?
CVE-2026-20127 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2026-20127?
CVE-2026-20127 affects Cisco Catalyst SD-WAN Controller and Manager. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-20127?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20127, 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

Explore the affected products and dependency analysis for CVE-2026-20127

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