CVE-2026-20273

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: 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 IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20273 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 17, 2026

Advisory Details (1)

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

Cisco IOS XE Software Security Hardening Release: August 2026

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJ

Vendor Advisories for CVE-2026-20273(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 23× in last 7d / 99× 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 163 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-20273?
CVE-2026-20273 is a high vulnerability published on August 5, 2026. As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The…
When was CVE-2026-20273 disclosed?
CVE-2026-20273 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20273 actively exploited?
CVE-2026-20273 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 79.6% of all scored CVEs.
What is the CVSS score of CVE-2026-20273?
CVE-2026-20273 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-20273?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20273, 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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