CVE-2016-8652

MEDIUMNVD 5.96.9▲
EchelonGraph scoreHIGH confidence

Score elevated to 6.9 because EPSS predicts 48% probability of exploitation within the next 30 days (top 1.3% of all CVEs). NVD baseline CVSS 5.9 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 48%CVSS: 5.9Exploit: Elevated riskExposed: 0

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

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.

CVSS v3
5.9
EG Score
6.9(high)
EG Risk
55(Track)
EG Risk 55/100SSVC: 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
Severity69% × 45%
Exploitation48% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
48%
EPSS %ILE
99%
KEV
Not listed

Published

February 17, 2017

Last Modified

June 17, 2026

References (8)

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
dovecot—1:2.2.27-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
dovecot—1:2.2.27-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dovecot—1:2.2.27-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dovecot—1:2.2.27-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 17× 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 122 total refreshes for this CVE.

  1. 2026-09-24 13:59 UTCEPSS rescore
  2. 2026-09-23 13:41 UTCEPSS rescore
  3. 2026-09-19 15:35 UTCEPSS rescore
  4. 2026-09-18 19:22 UTCEPSS rescore
  5. 2026-09-18 16:20 UTCOSV refresh
  6. 2026-09-17 19:22 UTCEPSS rescore
  7. 2026-09-16 05:05 UTCEPSS rescore
  8. 2026-09-15 03:05 UTCEPSS rescore
  9. 2026-09-12 14:55 UTCEPSS rescore
  10. 2026-09-11 14:46 UTCEPSS rescore
  11. 2026-09-10 09:26 UTCEPSS rescore
  12. 2026-09-02 14:07 UTCEPSS rescore
  13. 2026-09-01 13:48 UTCEPSS rescore
  14. 2026-09-01 03:31 UTCEPSS rescore
  15. 2026-08-30 19:38 UTCOSV refresh
  16. 2026-08-28 21:35 UTCEPSS rescore
  17. 2026-08-26 14:41 UTCEPSS rescore
  18. 2026-08-25 13:44 UTCEPSS rescore
  19. 2026-08-21 23:44 UTCEPSS rescore
  20. 2026-08-19 16:59 UTCEPSS rescore
  21. 2026-08-18 13:43 UTCEPSS rescore
  22. 2026-08-17 13:42 UTCEPSS rescore
  23. 2026-08-16 14:51 UTCEPSS rescore
  24. 2026-08-16 02:10 UTCEPSS rescore
  25. 2026-08-15 01:25 UTCEPSS rescore
Show 75 more
  1. 2026-08-14 06:16 UTCOSV refresh
  2. 2026-08-12 13:46 UTCEPSS rescore
  3. 2026-08-11 13:36 UTCEPSS rescore
  4. 2026-08-09 13:42 UTCEPSS rescore
  5. 2026-08-07 16:22 UTCEPSS rescore
  6. 2026-08-06 13:42 UTCEPSS rescore
  7. 2026-08-04 15:05 UTCEPSS rescore
  8. 2026-08-02 02:22 UTCEPSS rescore
  9. 2026-07-30 16:24 UTCEPSS rescore
  10. 2026-07-30 01:26 UTCEPSS rescore
  11. 2026-07-30 01:26 UTCEPSS rescore
  12. 2026-07-29 12:07 UTCOSV refresh
  13. 2026-07-28 15:31 UTCEPSS rescore
  14. 2026-07-26 14:50 UTCEPSS rescore
  15. 2026-07-25 14:13 UTCEPSS rescore
  16. 2026-07-24 14:13 UTCEPSS rescore
  17. 2026-07-23 14:15 UTCEPSS rescore
  18. 2026-07-23 01:24 UTCEG score recompute▲ 1.00
  19. 2026-07-22 22:03 UTCEG score recompute
  20. 2026-07-22 14:04 UTCEPSS rescore
  21. 2026-07-21 15:21 UTCEPSS rescore
  22. 2026-07-21 15:21 UTCEPSS rescore
  23. 2026-07-20 17:04 UTCEPSS rescore
  24. 2026-07-19 02:26 UTCEPSS rescore
  25. 2026-07-19 02:26 UTCEPSS rescore
  26. 2026-07-18 10:00 UTCEPSS rescore
  27. 2026-07-18 10:00 UTCEPSS rescore
  28. 2026-07-16 16:59 UTCEPSS rescore
  29. 2026-07-16 16:59 UTCEPSS rescore
  30. 2026-07-15 16:54 UTCEPSS rescore
  31. 2026-07-15 16:54 UTCEPSS rescore
  32. 2026-07-13 22:26 UTCEPSS rescore
  33. 2026-07-13 06:09 UTCEPSS rescore
  34. 2026-07-12 05:43 UTCEPSS rescore
  35. 2026-07-12 05:43 UTCEPSS rescore
  36. 2026-07-12 03:41 UTCOSV refresh
  37. 2026-07-11 08:24 UTCEPSS rescore
  38. 2026-07-09 19:06 UTCEPSS rescore
  39. 2026-07-08 15:10 UTCEPSS rescore
  40. 2026-07-07 13:42 UTCEPSS rescore
  41. 2026-07-01 15:02 UTCEPSS rescore
  42. 2026-06-29 14:03 UTCEPSS rescore
  43. 2026-06-28 04:53 UTCEPSS rescore
  44. 2026-06-25 13:47 UTCEPSS rescore
  45. 2026-06-24 14:02 UTCEPSS rescore
  46. 2026-06-23 21:30 UTCEPSS rescore
  47. 2026-06-23 10:00 UTCOSV refresh
  48. 2026-06-21 14:54 UTCEPSS rescore
  49. 2026-06-21 14:54 UTCEPSS rescore
  50. 2026-06-21 01:57 UTCEPSS rescore
  51. 2026-06-21 01:57 UTCEPSS rescore
  52. 2026-06-18 17:50 UTCEPSS rescore
  53. 2026-06-18 17:50 UTCEPSS rescore
  54. 2026-06-17 17:50 UTCEPSS rescore
  55. 2026-06-17 17:50 UTCEPSS rescore
  56. 2026-06-16 17:50 UTCEPSS rescore
  57. 2026-06-15 17:45 UTCEPSS rescore
  58. 2026-06-14 23:14 UTCEPSS rescore
  59. 2026-06-14 23:14 UTCEPSS rescore
  60. 2026-06-13 22:57 UTCEPSS rescore
  61. 2026-06-13 22:57 UTCEPSS rescore
  62. 2026-06-12 23:09 UTCEPSS rescore
  63. 2026-06-11 13:57 UTCEPSS rescore
  64. 2026-06-08 14:14 UTCEPSS rescore
  65. 2026-06-07 15:22 UTCEPSS rescore
  66. 2026-06-07 15:22 UTCEPSS rescore
  67. 2026-06-06 13:45 UTCEPSS rescore
  68. 2026-06-06 13:45 UTCEPSS rescore
  69. 2026-06-06 09:51 UTCOSV refresh
  70. 2026-06-05 22:44 UTCEPSS rescore
  71. 2026-06-05 06:08 UTCEPSS rescore
  72. 2026-06-05 06:08 UTCEPSS rescore
  73. 2026-06-04 13:10 UTCEPSS rescore
  74. 2026-06-04 13:10 UTCEPSS rescore
  75. 2026-06-02 20:10 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2016-8652?
CVE-2016-8652 is a medium vulnerability published on February 17, 2017. The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborting authentication without setting a username.
When was CVE-2016-8652 disclosed?
CVE-2016-8652 was first published in the National Vulnerability Database on February 17, 2017, 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-2016-8652 actively exploited?
CVE-2016-8652 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48% probability of exploitation in the next 30 days, which ranks it in the top 1.2% of all scored CVEs.
What is the CVSS score of CVE-2016-8652?
CVE-2016-8652 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.9.
How do I remediate CVE-2016-8652?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-8652, 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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