CVE-2026-56168

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.5 from GitHub Security Advisory published 2026-07-14. The CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2026-44236 (ENISA EUVD) · GHSA-2875-28w4-4vqx (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.1%
EPSS %ILE
66th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

October 8, 2026

Advisory Details (1)

Auto-updated Jul 15, 2026
Patch available. Sources: microsoft.
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56168

Vendor Advisories for CVE-2026-56168(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 10× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 291 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 191 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  3. 2026-10-25 14:18 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  6. 2026-10-22 21:12 UTCEG score recompute
  7. 2026-10-22 21:12 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  8. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  10. 2026-10-20 16:33 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  11. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  12. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  13. 2026-10-18 03:29 UTCEG score recompute
  14. 2026-10-17 16:34 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  15. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.1% · 66th percentile
  16. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  17. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  18. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  20. 2026-10-12 15:55 UTCEG score recompute
  21. 2026-10-11 19:38 UTCEG score recompute
  22. 2026-10-11 16:53 UTCEG score recompute
  23. 2026-10-11 14:16 UTCEG score recompute
  24. 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.1% · 65th percentile
Show 75 more
  1. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  2. 2026-10-08 19:19 UTCEG score recompute
  3. 2026-10-08 19:19 UTCVendor advisory
  4. 2026-10-08 19:19 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  5. 2026-10-08 17:13 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  7. 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  11. 2026-10-02 17:56 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  13. 2026-10-01 12:56 UTCEG score recompute
  14. 2026-10-01 12:56 UTCVendor advisory
  15. 2026-10-01 12:56 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  17. 2026-09-29 15:22 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-09-28 09:02 UTCEG score recompute
  20. 2026-09-28 09:02 UTCVendor advisory
  21. 2026-09-28 09:02 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  23. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  24. 2026-09-25 18:43 UTCEG score recompute
  25. 2026-09-25 18:43 UTCVendor advisory
  26. 2026-09-25 18:43 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  27. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  28. 2026-09-24 09:05 UTCEG score recompute
  29. 2026-09-24 09:05 UTCVendor advisory
  30. 2026-09-24 09:05 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  31. 2026-09-23 17:54 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  32. 2026-09-23 03:36 UTCEG score recompute
  33. 2026-09-23 03:36 UTCVendor advisory
  34. 2026-09-23 03:36 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  35. 2026-09-20 20:16 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  36. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  37. 2026-09-17 23:00 UTCEG score recompute
  38. 2026-09-17 23:00 UTCVendor advisory
  39. 2026-09-17 23:00 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  40. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  41. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  42. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  43. 2026-09-15 03:11 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  44. 2026-09-14 07:09 UTCEG score recompute
  45. 2026-09-14 07:09 UTCVendor advisory
  46. 2026-09-14 07:09 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  47. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  48. 2026-09-13 07:43 UTCEG score recompute
  49. 2026-09-13 07:43 UTCVendor advisory
  50. 2026-09-13 07:43 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  51. 2026-09-12 01:22 UTCEG score recompute
  52. 2026-09-12 01:22 UTCVendor advisory
  53. 2026-09-12 01:22 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  54. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  55. 2026-09-10 09:35 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  56. 2026-09-09 22:43 UTCEG score recompute
  57. 2026-09-09 22:43 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  58. 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  59. 2026-09-08 21:09 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  60. 2026-09-08 20:25 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  61. 2026-09-08 01:19 UTCEG score recompute
  62. 2026-09-08 01:19 UTCVendor advisory
  63. 2026-09-08 01:18 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  64. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  65. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  66. 2026-09-05 22:29 UTCEG score recompute
  67. 2026-09-05 22:29 UTCVendor advisory
  68. 2026-09-05 22:29 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  69. 2026-09-04 22:46 UTCEG score recompute
  70. 2026-09-04 22:46 UTCVendor advisory
  71. 2026-09-04 22:46 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5
  72. 2026-09-04 05:07 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  73. 2026-09-02 19:42 UTCEG score recompute
  74. 2026-09-02 19:42 UTCVendor advisory
  75. 2026-09-02 19:42 UTCGHSA enrichmentGHSA-2875-28w4-4vqx · GitHub CVSS 6.5

Frequently asked(5)

What is CVE-2026-56168?
CVE-2026-56168 is a medium-severity vulnerability; its CVE record was published on July 14, 2026. Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
When was CVE-2026-56168 made public?
CVE-2026-56168 was made public on July 14, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on July 14, 2026. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-56168 actively exploited?
CVE-2026-56168 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56168?
CVE-2026-56168 has a CVSS base score of 6.5 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-56168?
A fix for CVE-2026-56168 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56168 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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