CVE-2026-20272

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-05. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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

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 software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

October 3, 2026

Advisory Details (2)

Auto-updated Oct 3, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification
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-2026-20272(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 25× in last 7d / 142× 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 351 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-20272?
CVE-2026-20272 is a critical 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 software hardening releases that address multiple internally discovered vulnerabilities. The…
When was CVE-2026-20272 disclosed?
CVE-2026-20272 was first published on August 5, 2026, with the most recent update on October 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20272 actively exploited?
CVE-2026-20272 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-20272?
CVE-2026-20272 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-20272?
No fix for CVE-2026-20272 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-20272 are linked in the Vendor Advisories panel on this page.

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