CVE-2024-53271

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 90% 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
Elevated
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.1Exploit: NoneExposed: 0

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

Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to upgrade. There are no known workarounds for this issue.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
—
EPSS
46.1%
KEV
Not listed

Published

December 18, 2024

Last Modified

September 4, 2025

References (3)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
  3. 2026-07-20 17:07 UTCEPSS rescore
  4. 2026-07-19 14:30 UTCEPSS rescore
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  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 01:59 UTCEPSS rescore
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  13. 2026-07-13 22:29 UTCEPSS rescore
  14. 2026-07-13 16:08 UTCOSV refresh
  15. 2026-07-13 06:12 UTCEPSS rescore
  16. 2026-07-12 05:45 UTCEPSS rescore
  17. 2026-07-11 08:26 UTCEPSS rescore
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  20. 2026-07-08 15:14 UTCEPSS rescore
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  1. 2026-07-05 02:29 UTCEPSS rescore
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  4. 2026-07-01 15:06 UTCEPSS rescore
  5. 2026-06-30 23:21 UTCEPSS rescore
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  7. 2026-06-29 14:05 UTCEPSS rescore
  8. 2026-06-28 14:07 UTCEPSS rescore
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  11. 2026-06-27 03:08 UTCEPSS rescore
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  13. 2026-06-25 13:49 UTCEPSS rescore
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  15. 2026-06-25 13:31 UTCOSV refresh
  16. 2026-06-24 14:04 UTCEPSS rescore
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  18. 2026-06-23 21:32 UTCEPSS rescore
  19. 2026-06-22 14:25 UTCEPSS rescore
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  21. 2026-06-21 14:56 UTCEPSS rescore
  22. 2026-06-21 14:56 UTCEPSS rescore
  23. 2026-06-21 01:59 UTCEPSS rescore
  24. 2026-06-19 19:25 UTCEPSS rescore
  25. 2026-06-19 19:25 UTCEPSS rescore
  26. 2026-06-18 17:52 UTCEPSS rescore
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  28. 2026-06-17 17:52 UTCEPSS rescore
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  30. 2026-06-15 17:48 UTCEPSS rescore
  31. 2026-06-14 23:17 UTCEPSS rescore
  32. 2026-06-13 22:59 UTCEPSS rescore
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  36. 2026-06-11 13:59 UTCEPSS rescore
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  38. 2026-06-10 22:18 UTCEPSS rescore
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  40. 2026-06-10 13:21 UTCEPSS rescore
  41. 2026-06-08 14:16 UTCEPSS rescore
  42. 2026-06-08 14:16 UTCEPSS rescore
  43. 2026-06-08 03:58 UTCOSV refresh
  44. 2026-06-07 15:24 UTCEPSS rescore
  45. 2026-06-07 15:24 UTCEPSS rescore
  46. 2026-06-06 13:46 UTCEPSS rescore
  47. 2026-06-06 13:46 UTCEPSS rescore
  48. 2026-06-05 22:46 UTCEPSS rescore
  49. 2026-06-05 22:46 UTCEPSS rescore
  50. 2026-06-05 06:09 UTCEPSS rescore
  51. 2026-06-05 06:09 UTCEPSS rescore
  52. 2026-06-04 13:11 UTCEPSS rescore
  53. 2026-06-04 13:11 UTCEPSS rescore
  54. 2026-06-02 20:12 UTCEPSS rescore
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  56. 2026-06-01 13:51 UTCEPSS rescore
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  59. 2026-05-31 22:30 UTCEPSS rescore
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  61. 2026-05-31 00:16 UTCEPSS rescore
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  63. 2026-05-29 13:43 UTCEPSS rescore
  64. 2026-05-28 13:44 UTCEPSS rescore
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  66. 2026-05-28 13:44 UTCEPSS rescore
  67. 2026-05-27 13:40 UTCEPSS rescore
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  69. 2026-05-26 13:43 UTCEPSS rescore
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  71. 2026-05-26 07:18 UTCEPSS rescore
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  73. 2026-05-26 07:18 UTCEPSS rescore
  74. 2026-05-23 16:17 UTCEG score recompute

Frequently asked(5)

What is CVE-2024-53271?
CVE-2024-53271 is a high vulnerability published on December 18, 2024. Envoy is a cloud-native high-performance edge/middle/service proxy. In affected versions envoy does not properly handle http 1.1 non-101 1xx responses. This can lead to downstream failures in networked devices. This issue has been addressed in versions 1.31.5 and 1.32.3. Users are advised to…
When was CVE-2024-53271 disclosed?
CVE-2024-53271 was first published in the National Vulnerability Database on December 18, 2024, with the most recent update on September 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-53271 actively exploited?
CVE-2024-53271 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-53271?
CVE-2024-53271 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2024-53271?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-53271, 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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