CVE-2026-64902

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA SSVC

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
Severity54% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 29, 2026

Advisory Details (1)

Auto-updated Aug 11, 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-2026-64902

Vendor Advisories for CVE-2026-64902(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 19× in last 7d / 103× 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 282 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64902?
CVE-2026-64902 is a medium vulnerability published on August 11, 2026. Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
When was CVE-2026-64902 disclosed?
CVE-2026-64902 was first published on August 11, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64902 actively exploited?
CVE-2026-64902 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64902?
CVE-2026-64902 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-64902?
A fix for CVE-2026-64902 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64902 are linked in the Vendor Advisories panel on this page.

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