CVE-2026-20310

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-05. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20310 are related to improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-59.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 14, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Cisco Catalyst SD-WAN Software Security Hardening Release: August 2026

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-sdwan-faLcR3K

Vendor Advisories for CVE-2026-20310(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 55× in last 7d / 130× 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 130 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20310?
CVE-2026-20310 is a critical vulnerability published on August 5, 2026. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The…
When was CVE-2026-20310 disclosed?
CVE-2026-20310 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20310 actively exploited?
CVE-2026-20310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.5% of all scored CVEs.
What is the CVSS score of CVE-2026-20310?
CVE-2026-20310 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-20310?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20310, 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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