CVE-2024-21646

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 5.1%, top 9% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.8Exploit: None knownExposed: 0

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

Azure uAMQP is a general purpose C library for AMQP 1.0. The UAMQP library is used by several clients to implement AMQP protocol communication. When clients using this library receive a crafted binary type data, an integer overflow or wraparound or memory safety issue can occur and may cause remote code execution. This vulnerability has been patched in release 2024-01-01.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
61(Track)
EG Risk 61/100SSVC: 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%
Exploitation5% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
91%
KEV
Not listed

Published

January 9, 2024

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jul 26, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Azure IoT Platform Device SDK Remote Code Execution Vulnerability · Advisory · Azure/azure-uamqp-c · GitHub

https://github.com/Azure/azure-uamqp-c/security/advisories/GHSA-j29m-p99g-7hpv
github_commit

commit 12ddb3a31a5a (Azure/azure-uamqp-c)

Fix landed in Azure/azure-uamqp-c commit 12ddb3a31a5a — awaiting tagged release

https://github.com/Azure/azure-uamqp-c/commit/12ddb3a31a5a97f55b06fa5d74c59a1d84ad78fe

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 40× 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 108 total refreshes for this CVE.

  1. 2026-07-25 14:16 UTCEPSS rescore
  2. 2026-07-24 14:16 UTCEPSS rescore
  3. 2026-07-23 14:17 UTCEPSS rescore
  4. 2026-07-23 14:17 UTCEPSS rescore
  5. 2026-07-23 02:33 UTCEG score recompute
  6. 2026-07-22 23:20 UTCEG score recompute
  7. 2026-07-22 14:07 UTCEPSS rescore
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  21. 2026-07-14 23:10 UTCOSV refresh
  22. 2026-07-13 22:28 UTCEPSS rescore
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  25. 2026-07-12 05:45 UTCEPSS rescore
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  1. 2026-07-11 08:26 UTCEPSS rescore
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  4. 2026-07-08 15:13 UTCEPSS rescore
  5. 2026-07-06 16:26 UTCEPSS rescore
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  8. 2026-07-05 02:29 UTCEPSS rescore
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  10. 2026-07-01 15:05 UTCEPSS rescore
  11. 2026-06-30 23:21 UTCEPSS rescore
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  18. 2026-06-27 03:07 UTCEPSS rescore
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  20. 2026-06-27 00:07 UTCOSV refresh
  21. 2026-06-25 13:48 UTCEPSS rescore
  22. 2026-06-25 13:48 UTCEPSS rescore
  23. 2026-06-24 14:04 UTCEPSS rescore
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  25. 2026-06-23 21:32 UTCEPSS rescore
  26. 2026-06-23 21:32 UTCEPSS rescore
  27. 2026-06-22 14:24 UTCEPSS rescore
  28. 2026-06-22 14:24 UTCEPSS rescore
  29. 2026-06-21 14:55 UTCEPSS rescore
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  31. 2026-06-21 01:58 UTCEPSS rescore
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  41. 2026-06-15 17:47 UTCEPSS rescore
  42. 2026-06-14 23:16 UTCEPSS rescore
  43. 2026-06-13 22:59 UTCEPSS rescore
  44. 2026-06-13 22:59 UTCEPSS rescore
  45. 2026-06-12 23:11 UTCEPSS rescore
  46. 2026-06-11 13:59 UTCEPSS rescore
  47. 2026-06-11 13:59 UTCEPSS rescore
  48. 2026-06-10 22:17 UTCEPSS rescore
  49. 2026-06-10 13:21 UTCEPSS rescore
  50. 2026-06-10 13:21 UTCEPSS rescore
  51. 2026-06-09 10:40 UTCOSV refresh
  52. 2026-06-08 14:16 UTCEPSS rescore
  53. 2026-06-08 14:16 UTCEPSS rescore
  54. 2026-06-07 15:24 UTCEPSS rescore
  55. 2026-06-07 15:24 UTCEPSS rescore
  56. 2026-06-06 13:46 UTCEPSS rescore
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  58. 2026-06-05 22:46 UTCEPSS rescore
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  60. 2026-06-05 06:09 UTCEPSS rescore
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  62. 2026-06-04 13:11 UTCEPSS rescore
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  71. 2026-05-29 13:43 UTCEPSS rescore
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  73. 2026-05-28 13:44 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-21646?
CVE-2024-21646 is a critical vulnerability published on January 9, 2024. Azure uAMQP is a general purpose C library for AMQP 1.0. The UAMQP library is used by several clients to implement AMQP protocol communication. When clients using this library receive a crafted binary type data, an integer overflow or wraparound or memory safety issue can occur and may cause remote…
When was CVE-2024-21646 disclosed?
CVE-2024-21646 was first published in the National Vulnerability Database on January 9, 2024, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-21646 actively exploited?
CVE-2024-21646 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.5% of all scored CVEs.
What is the CVSS score of CVE-2024-21646?
CVE-2024-21646 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-21646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21646, 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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