CVE-2026-49921

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-08. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

In multiple locations, there is a possible memory safety issue due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

Android Security Bulletin—September 2026  |  Android Open Source Project

https://source.android.com/docs/security/bulletin/2026/2026-09-01

Vendor Advisories for CVE-2026-49921(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 52× in last 7d / 98× 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.

  1. 2026-09-21 04:26 UTCGHSA enrichment
  2. 2026-09-21 00:23 UTCGHSA enrichment
  3. 2026-09-20 20:21 UTCEG score recompute
  4. 2026-09-20 20:21 UTCGHSA enrichment
  5. 2026-09-20 20:16 UTCEPSS rescore
  6. 2026-09-20 16:21 UTCGHSA enrichment
  7. 2026-09-20 12:20 UTCGHSA enrichment
  8. 2026-09-20 08:09 UTCGHSA enrichment
  9. 2026-09-20 04:10 UTCGHSA enrichment
  10. 2026-09-20 00:10 UTCGHSA enrichment
  11. 2026-09-19 20:11 UTCGHSA enrichment
  12. 2026-09-19 16:12 UTCEG score recompute
  13. 2026-09-19 16:12 UTCGHSA enrichment
  14. 2026-09-19 12:13 UTCGHSA enrichment
  15. 2026-09-19 08:13 UTCGHSA enrichment
  16. 2026-09-19 04:14 UTCGHSA enrichment
  17. 2026-09-19 00:14 UTCGHSA enrichment
  18. 2026-09-18 20:15 UTCEG score recompute
  19. 2026-09-18 20:15 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 16:14 UTCGHSA enrichment
  22. 2026-09-18 12:15 UTCGHSA enrichment
  23. 2026-09-18 08:16 UTCGHSA enrichment
  24. 2026-09-18 04:17 UTCGHSA enrichment
  25. 2026-09-18 00:18 UTCGHSA enrichment
Show 73 more
  1. 2026-09-17 20:19 UTCEG score recompute
  2. 2026-09-17 20:19 UTCGHSA enrichment
  3. 2026-09-17 15:36 UTCGHSA enrichment
  4. 2026-09-17 11:36 UTCGHSA enrichment
  5. 2026-09-17 07:35 UTCGHSA enrichment
  6. 2026-09-17 03:36 UTCGHSA enrichment
  7. 2026-09-16 23:37 UTCGHSA enrichment
  8. 2026-09-16 19:37 UTCGHSA enrichment
  9. 2026-09-16 15:35 UTCEG score recompute
  10. 2026-09-16 15:35 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 11:21 UTCGHSA enrichment
  13. 2026-09-16 07:22 UTCEG score recompute
  14. 2026-09-16 07:22 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 03:23 UTCGHSA enrichment
  17. 2026-09-15 23:24 UTCGHSA enrichment
  18. 2026-09-15 19:25 UTCGHSA enrichment
  19. 2026-09-15 15:26 UTCGHSA enrichment
  20. 2026-09-15 11:27 UTCGHSA enrichment
  21. 2026-09-15 07:28 UTCGHSA enrichment
  22. 2026-09-15 03:29 UTCEG score recompute
  23. 2026-09-15 03:29 UTCGHSA enrichment
  24. 2026-09-14 23:30 UTCGHSA enrichment
  25. 2026-09-14 18:59 UTCGHSA enrichment
  26. 2026-09-14 15:00 UTCGHSA enrichment
  27. 2026-09-14 11:00 UTCGHSA enrichment
  28. 2026-09-14 07:01 UTCGHSA enrichment
  29. 2026-09-14 03:01 UTCGHSA enrichment
  30. 2026-09-13 23:02 UTCGHSA enrichment
  31. 2026-09-13 19:03 UTCEG score recompute
  32. 2026-09-13 19:03 UTCGHSA enrichment
  33. 2026-09-13 16:47 UTCEPSS rescore
  34. 2026-09-13 15:04 UTCGHSA enrichment
  35. 2026-09-13 11:05 UTCGHSA enrichment
  36. 2026-09-13 07:05 UTCGHSA enrichment
  37. 2026-09-13 03:07 UTCGHSA enrichment
  38. 2026-09-12 23:08 UTCGHSA enrichment
  39. 2026-09-12 19:09 UTCGHSA enrichment
  40. 2026-09-12 15:10 UTCEG score recompute
  41. 2026-09-12 15:10 UTCGHSA enrichment
  42. 2026-09-12 11:11 UTCGHSA enrichment
  43. 2026-09-12 07:12 UTCGHSA enrichment
  44. 2026-09-12 03:13 UTCGHSA enrichment
  45. 2026-09-11 23:13 UTCGHSA enrichment
  46. 2026-09-11 19:07 UTCGHSA enrichment
  47. 2026-09-11 15:04 UTCEG score recompute
  48. 2026-09-11 15:04 UTCGHSA enrichment
  49. 2026-09-11 14:53 UTCEPSS rescore
  50. 2026-09-11 11:05 UTCEG score recompute
  51. 2026-09-11 11:05 UTCGHSA enrichment
  52. 2026-09-11 07:06 UTCGHSA enrichment
  53. 2026-09-11 03:06 UTCGHSA enrichment
  54. 2026-09-10 23:07 UTCGHSA enrichment
  55. 2026-09-10 19:06 UTCGHSA enrichment
  56. 2026-09-10 15:07 UTCGHSA enrichment
  57. 2026-09-10 11:07 UTCEG score recompute
  58. 2026-09-10 11:07 UTCGHSA enrichment
  59. 2026-09-10 09:35 UTCEPSS rescore
  60. 2026-09-10 07:04 UTCGHSA enrichment
  61. 2026-09-10 03:04 UTCGHSA enrichment
  62. 2026-09-09 23:05 UTCGHSA enrichment
  63. 2026-09-09 16:55 UTCGHSA enrichment
  64. 2026-09-09 12:41 UTCGHSA enrichment
  65. 2026-09-09 08:41 UTCGHSA enrichment
  66. 2026-09-09 04:42 UTCGHSA enrichment
  67. 2026-09-09 00:37 UTCEG score recompute
  68. 2026-09-09 00:36 UTCGHSA enrichment
  69. 2026-09-08 20:02 UTCEG score recompute▲ 9.80
  70. 2026-09-08 19:59 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  71. 2026-09-08 19:30 UTCNVD update
  72. 2026-09-08 18:31 UTCEG score recompute
  73. 2026-09-08 18:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49921?
CVE-2026-49921 is a critical vulnerability published on September 8, 2026. In multiple locations, there is a possible memory safety issue due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
When was CVE-2026-49921 disclosed?
CVE-2026-49921 was first published in the National Vulnerability Database on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49921 actively exploited?
CVE-2026-49921 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 75.4% of all scored CVEs.
What is the CVSS score of CVE-2026-49921?
CVE-2026-49921 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-49921?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49921, 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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