CVE-2025-12829

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.2 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.2Exploit: NoneExposed: 0

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

An uninitialized stack read issue exists in Amazon Ion-C versions

CVSS v3
6.2
EG Score
6.2(medium)
EPSS
4.3%
KEV
Not listed

Published

November 7, 2025

Last Modified

April 15, 2026

References (3)

Vendor Advisories for CVE-2025-12829(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 / 42× 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. 2026-07-06 16:26 UTCEPSS rescore
  2. 2026-07-06 02:22 UTCEPSS rescore
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  18. 2026-06-23 21:32 UTCEPSS rescore
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  21. 2026-06-21 14:56 UTCEPSS rescore
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  23. 2026-06-21 12:31 UTCOSV refresh
  24. 2026-06-21 01:59 UTCEPSS rescore
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  1. 2026-06-19 19:25 UTCEPSS rescore
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  3. 2026-06-18 17:52 UTCEPSS rescore
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  7. 2026-06-15 17:48 UTCEPSS rescore
  8. 2026-06-14 23:17 UTCEPSS rescore
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  18. 2026-06-06 13:47 UTCEPSS rescore
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  22. 2026-06-05 06:10 UTCEPSS rescore
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  24. 2026-06-04 13:11 UTCEPSS rescore
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  26. 2026-06-02 20:12 UTCEPSS rescore
  27. 2026-06-02 20:12 UTCEPSS rescore
  28. 2026-06-02 06:39 UTCOSV refresh
  29. 2026-06-01 13:51 UTCEPSS rescore
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  44. 2026-05-26 13:43 UTCEPSS rescore
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  48. 2026-05-26 07:18 UTCEPSS rescore
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  52. 2026-05-24 16:56 UTCEPSS rescore
  53. 2026-05-23 15:20 UTCEPSS rescore
  54. 2026-05-23 00:09 UTCEG score recompute
  55. 2026-05-22 21:16 UTCEPSS rescore
  56. 2026-05-22 21:16 UTCEPSS rescore
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  58. 2026-05-21 22:42 UTCEPSS rescore
  59. 2026-05-21 05:05 UTCEG score recompute
  60. 2026-05-20 22:37 UTCEPSS rescore
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  65. 2026-05-20 11:21 UTCEPSS rescore
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  69. 2026-05-20 11:21 UTCEPSS rescore
  70. 2026-05-18 21:30 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-12829?
CVE-2025-12829 is a medium vulnerability published on November 7, 2025. An uninitialized stack read issue exists in Amazon Ion-C versions <v1.1.4 that may allow a threat actor to craft data and serialize it to Ion text in such a way that sensitive data in memory could be exposed through UTF-8 escape sequences. To mitigate this issue, users should upgrade to version…
When was CVE-2025-12829 disclosed?
CVE-2025-12829 was first published in the National Vulnerability Database on November 7, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-12829 actively exploited?
CVE-2025-12829 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-12829?
CVE-2025-12829 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2025-12829?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12829, 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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