CVE-2026-34054

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (54th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source

Also known asEUVD-2026-17285 (ENISA EUVD)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.8Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

vcpkg is a free and open-source C/C++ package manager. Prior to version 3.6.1#3, vcpkg's Windows builds of OpenSSL set openssldir to a path on the build machine, making that path be attackable later on customer machines. This issue has been patched in version 3.6.1#3.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
54th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS. 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 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 low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

March 31, 2026

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
Fix named in the CVE record. Sources: github_commit, github_pr, github.
GitHub advisoryMentions a patch (unverified)

openssl on Windows built with openssldir set from the build machine (Uncontrolled Search Path Element) · Advisory · microsoft/vcpkg · GitHub

https://github.com/microsoft/vcpkg/security/advisories/GHSA-p322-v6vw-vrq9
GitHub pull request

[openssl] Don't set openssldir to a potentially-world-writable location.

Fix merged in microsoft/vcpkg PR #50518 on 2026-03-18 — awaiting tagged release

https://github.com/microsoft/vcpkg/pull/50518
GitHub commit

commit 5111afdf55cc (microsoft/vcpkg)

Fix landed in microsoft/vcpkg commit 5111afdf55cc — awaiting tagged release

https://github.com/microsoft/vcpkg/commit/5111afdf55cc1429d9951e4c7b02010e659346a9

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× 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 98 of 105 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 7 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  3. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  4. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  5. 2026-10-27 11:09 UTCEG score recompute
  6. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  7. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-25 14:34 UTCEG score recompute
  9. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  10. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  12. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  14. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  15. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  16. 2026-10-18 03:46 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  18. 2026-10-17 15:40 UTCEG score recompute
  19. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  20. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  21. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  22. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  24. 2026-10-12 16:13 UTCEG score recompute
  25. 2026-10-11 19:55 UTCEG score recompute
Show 73 more
  1. 2026-10-11 17:08 UTCEG score recompute
  2. 2026-10-11 14:35 UTCEG score recompute
  3. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  4. 2026-10-11 03:31 UTCOSV refresh
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  18. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  19. 2026-09-21 15:19 UTCOSV refresh
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  22. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  26. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  35. 2026-09-02 12:44 UTCOSV refresh
  36. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  37. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  38. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  39. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  40. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  41. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  42. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  43. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  44. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  45. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  47. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  48. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  50. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  52. 2026-08-16 09:42 UTCEG score recompute
  53. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  54. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  55. 2026-08-14 06:06 UTCEG score recompute
  56. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  57. 2026-08-12 20:26 UTCEG score recompute
  58. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  59. 2026-08-11 20:38 UTCEG score recompute
  60. 2026-08-11 03:39 UTCEG score recompute
  61. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  62. 2026-08-09 18:35 UTCEG score recompute
  63. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  64. 2026-08-09 05:41 UTCEG score recompute
  65. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  66. 2026-08-08 04:41 UTCEG score recompute
  67. 2026-08-06 18:13 UTCEG score recompute
  68. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  69. 2026-08-06 00:38 UTCEG score recompute
  70. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  72. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  73. 2026-08-03 22:58 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-34054?
CVE-2026-34054 is a high-severity vulnerability; its CVE record was published on March 31, 2026. vcpkg is a free and open-source C/C++ package manager. Prior to version 3.6.1#3, vcpkg's Windows builds of OpenSSL set openssldir to a path on the build machine, making that path be attackable later on customer machines. This issue has been patched in version 3.6.1#3.
When was the CVE record for CVE-2026-34054 published?
The CVE record for CVE-2026-34054 was published on March 31, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-34054 actively exploited?
CVE-2026-34054 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34054?
CVE-2026-34054 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-34054?
The CVE record for CVE-2026-34054 names the fix: "This issue has been patched in version 3.6.1#3."

Dependency Blast Radius

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