CVE-2011-4574

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 37% 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
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

PolarSSL versions prior to v1.1 use the HAVEGE random number generation algorithm. At its heart, this uses timing information based on the processor's high resolution timer (the RDTSC instruction). This instruction can be virtualized, and some virtual machine hosts have chosen to disable this instruction, returning 0s or predictable results.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
60.3%
KEV
Not listed

Published

October 27, 2021

Last Modified

November 21, 2024

References (2)

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. 2026-07-11 08:22 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-08 15:10 UTCEPSS rescore
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  10. 2026-07-02 14:01 UTCEPSS rescore
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  13. 2026-06-30 23:19 UTCEPSS rescore
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  15. 2026-06-28 14:03 UTCEPSS rescore
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  18. 2026-06-27 03:05 UTCEPSS rescore
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  20. 2026-06-25 13:46 UTCEPSS rescore
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  1. 2026-06-22 14:22 UTCEPSS rescore
  2. 2026-06-21 01:56 UTCEPSS rescore
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  4. 2026-06-19 19:22 UTCEPSS rescore
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  6. 2026-06-18 17:49 UTCEPSS rescore
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  17. 2026-06-12 23:08 UTCEPSS rescore
  18. 2026-06-11 13:56 UTCEPSS rescore
  19. 2026-06-10 22:14 UTCEPSS rescore
  20. 2026-06-10 13:17 UTCEPSS rescore
  21. 2026-06-08 14:14 UTCEPSS rescore
  22. 2026-06-08 14:14 UTCEPSS rescore
  23. 2026-06-07 15:22 UTCEPSS rescore
  24. 2026-06-07 15:22 UTCEPSS rescore
  25. 2026-06-06 13:45 UTCEPSS rescore
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  27. 2026-06-05 22:44 UTCEPSS rescore
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  36. 2026-05-31 22:28 UTCEPSS rescore
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  40. 2026-05-29 13:41 UTCEPSS rescore
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  42. 2026-05-28 13:42 UTCEPSS rescore
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  44. 2026-05-28 13:42 UTCEPSS rescore
  45. 2026-05-27 13:38 UTCEPSS rescore
  46. 2026-05-27 13:38 UTCEPSS rescore
  47. 2026-05-26 13:41 UTCEPSS rescore
  48. 2026-05-26 13:41 UTCEPSS rescore
  49. 2026-05-26 08:26 UTCEG score recompute
  50. 2026-05-26 08:26 UTCGHSA enrichment
  51. 2026-05-26 07:16 UTCEPSS rescore
  52. 2026-05-26 07:16 UTCEPSS rescore
  53. 2026-05-24 16:43 UTCEPSS rescore

Frequently asked(5)

What is CVE-2011-4574?
CVE-2011-4574 is a critical vulnerability published on October 27, 2021. PolarSSL versions prior to v1.1 use the HAVEGE random number generation algorithm. At its heart, this uses timing information based on the processor's high resolution timer (the RDTSC instruction). This instruction can be virtualized, and some virtual machine hosts have chosen to disable this…
When was CVE-2011-4574 disclosed?
CVE-2011-4574 was first published in the National Vulnerability Database on October 27, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-4574 actively exploited?
CVE-2011-4574 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-4574?
CVE-2011-4574 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2011-4574?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4574, 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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