CVE-2026-84484

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-02. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 7.5Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100CISA 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.9%
EPSS %ILE
57th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

September 2, 2026

Last Modified

September 24, 2026

Advisory Details (7)

Auto-updated Sep 2, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, github_commit.
generic

ION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnv | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ion-dtn-before-4.2.0-out-of-bounds-read-via-decodesdnv
githubMentions a patch (unverified)🟡 PoC Available

Pre-Authentication Out-of-Bounds Read in SDNV Decoder · Advisory · nasa-jpl/ION-DTN · GitHub

https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7
github_release Patch Available

ION Open Source 4.2.0

Patch available: nasa-jpl/ION-DTN ion-open-source-4.2.0

https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0
github_commit Patch Available

commit d52d22bdd383 (nasa-jpl/ION-DTN)

Patch available: nasa-jpl/ION-DTN ion-open-source-4.2.0 (contains commit d52d22bdd383)

https://github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a2778757f740e812
generic

ION-DTN/ici/library/platform.c at ion-open-source-4.1.4 · nasa-jpl/ION-DTN · GitHub

https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/platform.c#L1982
generic

ION-DTN/ici/library/ion.c at ion-open-source-4.1.4 · nasa-jpl/ION-DTN · GitHub

https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/ion.c#L1693
generic

GitHub - nasa-jpl/ION-DTN: The Interplanetary Overlay Network (ION) is NASA's open-source software implementation of Delay Tolerant Networking (DTN). ION development is managed by the Jet Propulsion Laboratory. · GitHub

https://github.com/nasa-jpl/ION-DTN

Vendor Advisories for CVE-2026-84484(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 25× in last 7d / 110× 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 144 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84484?
CVE-2026-84484 is a high vulnerability published on September 2, 2026. ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger…
When was CVE-2026-84484 disclosed?
CVE-2026-84484 was first published on September 2, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84484 actively exploited?
CVE-2026-84484 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (57th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-84484?
CVE-2026-84484 has a CVSS base score of 7.5 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-84484?
A fix for CVE-2026-84484 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-84484 are linked in the Vendor Advisories panel on this page.

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