CVE-2026-20459

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

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

In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01816800; Issue ID: MSV-6842.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jul 1, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

July 2026

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

Vendor Advisories for CVE-2026-20459(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 6× in last 7d / 52× 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 160 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-20459?
CVE-2026-20459 is a medium vulnerability published on July 1, 2026. In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch…
When was CVE-2026-20459 disclosed?
CVE-2026-20459 was first published in the National Vulnerability Database on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20459 actively exploited?
CVE-2026-20459 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 81.7% of all scored CVEs.
What is the CVSS score of CVE-2026-20459?
CVE-2026-20459 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-20459?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20459, 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.

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