CVE-2026-20452

HIGHPre-NVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-06-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.0Exploit: Elevated riskExposed: 0

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

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.

CVSS v3
8.0
EG Score
8.0(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: 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
Severity80% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

June 2026

https://corp.mediatek.com/product-security-bulletin/June-2026

Vendor Advisories for CVE-2026-20452(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 7× in last 7d / 37× 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 255 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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

  • GitHub PoCHunt-Benito/mediatek-wlan-heap-overflow-cve-2026-20452-filogic-router-rce
    First seen Jun 6, 2026
    Open source ↗

Frequently asked(5)

What is CVE-2026-20452?
CVE-2026-20452 is a high vulnerability published on June 1, 2026. In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.
When was CVE-2026-20452 disclosed?
CVE-2026-20452 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20452 actively exploited?
CVE-2026-20452 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 63.1% of all scored CVEs.
What is the CVSS score of CVE-2026-20452?
CVE-2026-20452 has a CVSS v3.1 base score of 8.0 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-20452?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20452, 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-2026-20452

Explore →

Is Your Infrastructure Affected by CVE-2026-20452?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs