CVE-2025-59028

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy perfomance penalty on large deployments). No publicly available exploits are known.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

March 27, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntudovecot-submissiond (1:2.3.21+dfsg1-2ubuntu6.3) @ noble2026-06-11ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.3-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
dovecot—2.4.3-r0—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6, 1:2.4.1+dfsg1-6+deb13u1, 1:2.4.1+dfsg1-6+deb13u2, 1:2.4.1+dfsg1-6+deb13u31:2.4.1+dfsg1-6+deb13u4—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
dovecot1:2.4.1+dfsg1-6 ... 1:2.4.2+dfsg1-4 (8 versions)1:2.4.3+dfsg1-1—

Weakness Classification(1)

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 7× in last 7d / 30× 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 227 total refreshes for this CVE.

  1. 2026-09-19 15:42 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-17 19:29 UTCEPSS rescore
  5. 2026-09-16 14:07 UTCEPSS rescore
  6. 2026-09-16 05:14 UTCEPSS rescore
  7. 2026-09-13 16:46 UTCEPSS rescore
  8. 2026-09-12 15:00 UTCEPSS rescore
  9. 2026-09-11 14:52 UTCEPSS rescore
  10. 2026-09-11 09:36 UTCEPSS rescore
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-08 21:59 UTCEPSS rescore
  13. 2026-09-07 16:00 UTCEPSS rescore
  14. 2026-09-06 13:47 UTCEPSS rescore
  15. 2026-09-05 15:28 UTCEPSS rescore
  16. 2026-09-04 05:06 UTCEPSS rescore
  17. 2026-09-02 14:11 UTCEPSS rescore
  18. 2026-09-02 13:14 UTCOSV refresh
  19. 2026-09-01 13:53 UTCEPSS rescore
  20. 2026-09-01 04:38 UTCEPSS rescore
  21. 2026-08-30 19:16 UTCEPSS rescore
  22. 2026-08-30 01:21 UTCEPSS rescore
  23. 2026-08-28 21:40 UTCEPSS rescore
  24. 2026-08-27 14:24 UTCEPSS rescore
  25. 2026-08-26 14:45 UTCEPSS rescore
Show 75 more
  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-24 14:16 UTCEPSS rescore
  3. 2026-08-24 09:22 UTCEPSS rescore
  4. 2026-08-23 00:18 UTCEPSS rescore
  5. 2026-08-21 23:48 UTCEPSS rescore
  6. 2026-08-20 22:54 UTCEPSS rescore
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-18 13:47 UTCEPSS rescore
  9. 2026-08-17 13:46 UTCEPSS rescore
  10. 2026-08-16 14:55 UTCEPSS rescore
  11. 2026-08-16 10:02 UTCEG score recompute
  12. 2026-08-16 10:02 UTCVendor advisory
  13. 2026-08-16 10:02 UTCGHSA enrichment
  14. 2026-08-16 02:13 UTCEPSS rescore
  15. 2026-08-15 01:29 UTCEPSS rescore
  16. 2026-08-14 19:13 UTCVendor advisory
  17. 2026-08-14 19:13 UTCGHSA enrichment
  18. 2026-08-14 06:21 UTCEG score recompute
  19. 2026-08-14 06:21 UTCVendor advisory
  20. 2026-08-14 06:21 UTCGHSA enrichment
  21. 2026-08-13 21:59 UTCEPSS rescore
  22. 2026-08-12 20:38 UTCEG score recompute
  23. 2026-08-12 20:38 UTCVendor advisory
  24. 2026-08-12 20:38 UTCGHSA enrichment
  25. 2026-08-12 13:50 UTCEPSS rescore
  26. 2026-08-12 13:50 UTCEPSS rescore
  27. 2026-08-11 20:46 UTCEG score recompute
  28. 2026-08-11 20:46 UTCVendor advisory
  29. 2026-08-11 20:46 UTCGHSA enrichment
  30. 2026-08-11 13:42 UTCEPSS rescore
  31. 2026-08-11 03:49 UTCEG score recompute
  32. 2026-08-11 03:49 UTCVendor advisory
  33. 2026-08-11 03:48 UTCGHSA enrichment
  34. 2026-08-10 23:59 UTCEPSS rescore
  35. 2026-08-10 05:56 UTCVendor advisory
  36. 2026-08-10 05:56 UTCGHSA enrichment
  37. 2026-08-09 17:55 UTCEG score recompute
  38. 2026-08-09 17:55 UTCVendor advisory
  39. 2026-08-09 17:55 UTCGHSA enrichment
  40. 2026-08-09 13:46 UTCEPSS rescore
  41. 2026-08-09 05:53 UTCEG score recompute
  42. 2026-08-09 05:53 UTCVendor advisory
  43. 2026-08-09 05:53 UTCGHSA enrichment
  44. 2026-08-08 16:36 UTCEPSS rescore
  45. 2026-08-08 04:22 UTCEG score recompute
  46. 2026-08-08 04:22 UTCVendor advisory
  47. 2026-08-08 04:22 UTCGHSA enrichment
  48. 2026-08-07 16:26 UTCEPSS rescore
  49. 2026-08-07 16:21 UTCVendor advisory
  50. 2026-08-07 16:21 UTCGHSA enrichment
  51. 2026-08-06 18:44 UTCEG score recompute
  52. 2026-08-06 18:44 UTCVendor advisory
  53. 2026-08-06 18:44 UTCGHSA enrichment
  54. 2026-08-06 13:46 UTCEPSS rescore
  55. 2026-08-06 00:48 UTCEG score recompute
  56. 2026-08-06 00:48 UTCVendor advisory
  57. 2026-08-06 00:48 UTCGHSA enrichment
  58. 2026-08-05 19:16 UTCEPSS rescore
  59. 2026-08-04 15:09 UTCEPSS rescore
  60. 2026-08-04 15:09 UTCEPSS rescore
  61. 2026-08-04 10:37 UTCEPSS rescore
  62. 2026-08-03 23:10 UTCEG score recompute
  63. 2026-08-03 23:10 UTCVendor advisory
  64. 2026-08-03 23:10 UTCGHSA enrichment
  65. 2026-08-03 10:35 UTCEPSS rescore
  66. 2026-08-02 15:13 UTCEG score recompute▲ 2.20
  67. 2026-08-02 15:13 UTCVendor advisory
  68. 2026-08-02 15:13 UTCGHSA enrichment
  69. 2026-08-02 02:26 UTCEPSS rescore
  70. 2026-08-01 04:15 UTCEPSS rescore
  71. 2026-07-30 16:27 UTCEPSS rescore
  72. 2026-07-30 01:30 UTCEPSS rescore
  73. 2026-07-28 15:35 UTCEPSS rescore
  74. 2026-07-26 14:54 UTCEPSS rescore
  75. 2026-07-25 14:17 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-59028?
CVE-2025-59028 is a high vulnerability published on March 27, 2026. When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in login processes…
When was CVE-2025-59028 disclosed?
CVE-2025-59028 was first published in the National Vulnerability Database on March 27, 2026, 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-2025-59028 actively exploited?
CVE-2025-59028 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.8% of all scored CVEs.
What is the CVSS score of CVE-2025-59028?
CVE-2025-59028 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-59028?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-59028, 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.

Dependency Blast Radius

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