CVE-2021-39206

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 1.5%, top 29% 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
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.6Exploit: NoneExposed: 0

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

Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, contains two authorization related vulnerabilities CVE-2021-32777 and CVE-2021-32779. This may lead to incorrect routing or authorization policy decisions. With specially crafted requests, incorrect authorization or routing decisions may be made by Pomerium. Pomerium v0.14.8 and v0.15.1 contain an upgraded envoy binary with these vulnerabilities patched. This issue can only be triggered when using path prefix based policy. Removing any such policies should provide mitigation.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
70.8%
KEV
Not listed

Published

September 9, 2021

Last Modified

November 21, 2024

References (8)

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/pomerium/pomerium0.15.00.15.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 45× 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 106 total refreshes for this CVE.

  1. 2026-07-25 14:15 UTCEPSS rescore
  2. 2026-07-24 14:15 UTCEPSS rescore
  3. 2026-07-23 14:16 UTCEPSS rescore
  4. 2026-07-23 14:16 UTCEPSS rescore
  5. 2026-07-23 02:03 UTCEG score recompute
  6. 2026-07-22 22:50 UTCEG score recompute
  7. 2026-07-22 14:06 UTCEPSS rescore
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  15. 2026-07-18 11:59 UTCOSV refresh
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  1. 2026-07-11 08:25 UTCEPSS rescore
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  3. 2026-07-09 19:07 UTCEPSS rescore
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  15. 2026-06-30 14:30 UTCOSV refresh
  16. 2026-06-29 14:04 UTCEPSS rescore
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  25. 2026-06-23 21:31 UTCEPSS rescore
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  27. 2026-06-22 14:24 UTCEPSS rescore
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  29. 2026-06-21 14:55 UTCEPSS rescore
  30. 2026-06-21 01:58 UTCEPSS rescore
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  40. 2026-06-14 23:15 UTCEPSS rescore
  41. 2026-06-13 22:58 UTCEPSS rescore
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  43. 2026-06-12 23:10 UTCEPSS rescore
  44. 2026-06-12 23:10 UTCEPSS rescore
  45. 2026-06-12 22:10 UTCOSV refresh
  46. 2026-06-11 13:58 UTCEPSS rescore
  47. 2026-06-10 22:16 UTCEPSS rescore
  48. 2026-06-10 13:20 UTCEPSS rescore
  49. 2026-06-08 14:15 UTCEPSS rescore
  50. 2026-06-08 14:15 UTCEPSS rescore
  51. 2026-06-07 15:23 UTCEPSS rescore
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  53. 2026-06-06 13:46 UTCEPSS rescore
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  57. 2026-06-05 06:09 UTCEPSS rescore
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  69. 2026-05-29 13:42 UTCEPSS rescore
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  71. 2026-05-28 13:43 UTCEPSS rescore
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  73. 2026-05-27 13:39 UTCEPSS rescore
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  75. 2026-05-27 13:39 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-39206?
CVE-2021-39206 is a high vulnerability published on September 9, 2021. Pomerium is an open source identity-aware access proxy. Envoy, which Pomerium is based on, contains two authorization related vulnerabilities CVE-2021-32777 and CVE-2021-32779. This may lead to incorrect routing or authorization policy decisions. With specially crafted requests, incorrect…
When was CVE-2021-39206 disclosed?
CVE-2021-39206 was first published in the National Vulnerability Database on September 9, 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-2021-39206 actively exploited?
CVE-2021-39206 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 70.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-39206?
CVE-2021-39206 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2021-39206?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-39206, 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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