CVE-2026-45502

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

Score 5.0 from GitHub Security Advisory published 2026-06-09. the CNA's CVSS baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this weekElevated
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 20%CVSS: 5.0Exploit: Elevated riskExposed: 0

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

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

CVSS v3
5.0
EG Score
5.0(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity50% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
20%
EPSS %ILE
97%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Jun 13, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45502

Vendor Advisories for CVE-2026-45502(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 44× 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 241 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45502?
CVE-2026-45502 is a medium vulnerability published on June 9, 2026. Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.
When was CVE-2026-45502 disclosed?
CVE-2026-45502 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45502 actively exploited?
CVE-2026-45502 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20% probability of exploitation in the next 30 days, which ranks it in the top 2.7% of all scored CVEs.
What is the CVSS score of CVE-2026-45502?
CVE-2026-45502 has a CVSS v4.0 base score of 5.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45502?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45502, 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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