CVE-2026-64897

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-2026-64897

Vendor Advisories for CVE-2026-64897(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 / 98× 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 270 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 23:12 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 02:13 UTCEG score recompute
  14. 2026-10-01 02:13 UTCVendor advisory
  15. 2026-10-01 02:13 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 13:51 UTCEPSS rescore
  21. 2026-09-28 12:46 UTCEG score recompute
  22. 2026-09-28 12:46 UTCVendor advisory
  23. 2026-09-28 12:46 UTCGHSA enrichment
  24. 2026-09-27 10:04 UTCEG score recompute
  25. 2026-09-27 10:04 UTCVendor advisory
Show 75 more
  1. 2026-09-27 10:04 UTCGHSA enrichment
  2. 2026-09-26 15:59 UTCEPSS rescore
  3. 2026-09-25 19:57 UTCEG score recompute
  4. 2026-09-25 19:57 UTCVendor advisory
  5. 2026-09-25 19:57 UTCGHSA enrichment
  6. 2026-09-24 13:58 UTCEG score recompute
  7. 2026-09-24 13:58 UTCVendor advisory
  8. 2026-09-24 13:58 UTCGHSA enrichment
  9. 2026-09-23 17:54 UTCEPSS rescore
  10. 2026-09-23 15:05 UTCEG score recompute
  11. 2026-09-23 15:05 UTCVendor advisory
  12. 2026-09-23 15:05 UTCGHSA enrichment
  13. 2026-09-22 12:42 UTCEG score recompute
  14. 2026-09-22 12:42 UTCVendor advisory
  15. 2026-09-22 12:41 UTCGHSA enrichment
  16. 2026-09-21 10:18 UTCEG score recompute
  17. 2026-09-21 10:18 UTCVendor advisory
  18. 2026-09-21 10:18 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 05:24 UTCEG score recompute
  21. 2026-09-20 05:24 UTCVendor advisory
  22. 2026-09-20 05:24 UTCGHSA enrichment
  23. 2026-09-19 03:01 UTCEG score recompute
  24. 2026-09-19 03:01 UTCVendor advisory
  25. 2026-09-19 03:01 UTCGHSA enrichment
  26. 2026-09-18 19:28 UTCEPSS rescore
  27. 2026-09-18 00:37 UTCEG score recompute
  28. 2026-09-18 00:37 UTCVendor advisory
  29. 2026-09-18 00:37 UTCGHSA enrichment
  30. 2026-09-16 17:01 UTCEG score recompute
  31. 2026-09-16 17:01 UTCVendor advisory
  32. 2026-09-16 17:01 UTCGHSA enrichment
  33. 2026-09-16 14:08 UTCEPSS rescore
  34. 2026-09-16 05:15 UTCEPSS rescore
  35. 2026-09-15 22:31 UTCEG score recompute
  36. 2026-09-15 22:31 UTCVendor advisory
  37. 2026-09-15 22:31 UTCGHSA enrichment
  38. 2026-09-14 17:58 UTCVendor advisory
  39. 2026-09-14 17:58 UTCGHSA enrichment
  40. 2026-09-13 22:02 UTCEG score recompute
  41. 2026-09-13 22:02 UTCVendor advisory
  42. 2026-09-13 22:02 UTCGHSA enrichment
  43. 2026-09-12 19:39 UTCEG score recompute
  44. 2026-09-12 19:39 UTCVendor advisory
  45. 2026-09-12 19:39 UTCGHSA enrichment
  46. 2026-09-11 17:16 UTCVendor advisory
  47. 2026-09-11 17:16 UTCGHSA enrichment
  48. 2026-09-11 15:58 UTCVendor advisory
  49. 2026-09-11 15:58 UTCGHSA enrichment
  50. 2026-09-11 15:37 UTCEG score recompute
  51. 2026-09-11 15:37 UTCVendor advisory
  52. 2026-09-11 15:37 UTCGHSA enrichment
  53. 2026-09-11 14:53 UTCEPSS rescore
  54. 2026-09-11 09:37 UTCEPSS rescore
  55. 2026-09-10 15:56 UTCEG score recompute
  56. 2026-09-10 15:56 UTCGHSA enrichment
  57. 2026-09-09 20:26 UTCVendor advisory
  58. 2026-09-09 20:26 UTCGHSA enrichment
  59. 2026-09-08 22:09 UTCEG score recompute
  60. 2026-09-08 22:09 UTCVendor advisory
  61. 2026-09-08 22:09 UTCGHSA enrichment
  62. 2026-09-08 22:01 UTCEPSS rescore
  63. 2026-09-08 18:21 UTCEG score recompute
  64. 2026-09-08 18:21 UTCVendor advisory
  65. 2026-09-08 18:21 UTCGHSA enrichment
  66. 2026-09-07 16:01 UTCEPSS rescore
  67. 2026-09-07 06:11 UTCEG score recompute
  68. 2026-09-07 06:11 UTCVendor advisory
  69. 2026-09-07 06:11 UTCGHSA enrichment
  70. 2026-09-06 13:47 UTCEPSS rescore
  71. 2026-09-06 03:36 UTCEG score recompute
  72. 2026-09-06 03:36 UTCVendor advisory
  73. 2026-09-06 03:36 UTCGHSA enrichment
  74. 2026-09-05 15:31 UTCEPSS rescore
  75. 2026-09-05 01:13 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64897?
CVE-2026-64897 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-2026-64897 disclosed?
CVE-2026-64897 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-2026-64897 actively exploited?
CVE-2026-64897 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-2026-64897?
CVE-2026-64897 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-64897?
A fix for CVE-2026-64897 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64897 are linked in the Vendor Advisories panel on this page.

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