CVE-2026-74225

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-30. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-89436 (ENISA EUVD) · GHSA-c478-wgg8-3gvq (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
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: 0.2%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the bootloader.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100

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)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
13th
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 (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

September 29, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 29, 2026
Patch available. Sources: github_commit.
Web page

U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-out-of-bounds-write-via-dhcpv6
Web page

GitHub - u-boot/u-boot: "Das U-Boot" Source Tree · GitHub

https://github.com/u-boot/u-boot
Web page

u-boot/net/dhcpv6.c at v2026.07 · u-boot/u-boot · GitHub

https://github.com/u-boot/u-boot/blob/v2026.07/net/dhcpv6.c#L304
GitHub commit

commit 20209a62bc85 (u-boot/u-boot)

Fix landed in u-boot/u-boot commit 20209a62bc85 — awaiting tagged release

https://github.com/u-boot/u-boot/commit/20209a62bc8565fc1e040882bc03c71ff0d73076

Vendor Advisories for CVE-2026-74225(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuu-boot-tools (2025.10-0ubuntu0.24.04.4) @ noble2026-10-30ubuntu
ubuntuu-boot-tools (2025.10-0ubuntu6) @ stonking2026-10-30ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
u-boot2023.01+dfsg-2 ... 2025.01-3.2 (24 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
u-boot2025.01-3, 2025.01-3+deb13u1, 2025.01-3.1, 2025.01-3.2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
u-boot2025.01-3, 2025.01-3.1, 2025.01-3.2
  • every version on: no fix on record
—

Weakness Classification(1)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 72× 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.

  1. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-30 00:34 UTCEG score recompute
  7. 2026-10-30 00:34 UTCVendor advisory
  8. 2026-10-30 00:34 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  9. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-27 21:09 UTCEG score recompute
  12. 2026-10-27 21:09 UTCVendor advisory
  13. 2026-10-27 21:09 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-10-25 14:04 UTCEG score recompute
  18. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-22 11:41 UTCEG score recompute
  22. 2026-10-22 11:41 UTCVendor advisory
  23. 2026-10-22 11:41 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 70 more
  1. 2026-10-20 08:24 UTCEG score recompute
  2. 2026-10-20 08:24 UTCVendor advisory
  3. 2026-10-20 08:24 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  4. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-18 03:14 UTCEG score recompute
  7. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  9. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-13 07:41 UTCEG score recompute
  13. 2026-10-13 07:41 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-12 15:40 UTCEG score recompute
  16. 2026-10-11 19:26 UTCEG score recompute
  17. 2026-10-11 18:28 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  18. 2026-10-11 16:41 UTCEG score recompute
  19. 2026-10-11 14:01 UTCEG score recompute
  20. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-11 05:59 UTCEG score recompute
  22. 2026-10-11 05:59 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  23. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-10-10 17:35 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  25. 2026-10-10 05:10 UTCEG score recompute
  26. 2026-10-10 05:10 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  27. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  28. 2026-10-09 16:45 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  29. 2026-10-09 04:19 UTCEG score recompute
  30. 2026-10-09 04:19 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  31. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  32. 2026-10-08 15:54 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  33. 2026-10-08 01:59 UTCEG score recompute
  34. 2026-10-08 01:58 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  35. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  36. 2026-10-07 13:34 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  37. 2026-10-07 01:10 UTCEG score recompute
  38. 2026-10-07 01:10 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  39. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-10-06 12:46 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  41. 2026-10-06 00:22 UTCEG score recompute
  42. 2026-10-06 00:22 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  43. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  44. 2026-10-05 11:57 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  45. 2026-10-04 23:34 UTCEG score recompute
  46. 2026-10-04 23:33 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  47. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  48. 2026-10-04 11:09 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  49. 2026-10-03 22:46 UTCEG score recompute
  50. 2026-10-03 22:46 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  51. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  52. 2026-10-03 10:22 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  53. 2026-10-02 21:58 UTCEG score recompute
  54. 2026-10-02 21:58 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  55. 2026-10-02 09:34 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  56. 2026-10-01 21:10 UTCEG score recompute
  57. 2026-10-01 21:10 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  58. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  59. 2026-10-01 08:46 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  60. 2026-09-30 20:23 UTCEG score recompute
  61. 2026-09-30 20:23 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  62. 2026-09-30 19:26 UTCEG score recompute
  63. 2026-09-30 19:26 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  64. 2026-09-30 16:45 UTCEG score recompute
  65. 2026-09-30 16:45 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  66. 2026-09-30 10:51 UTCEG score recompute
  67. 2026-09-30 10:51 UTCGHSA enrichmentGHSA-c478-wgg8-3gvq · GitHub severity HIGH · GitHub CVSS 7.1
  68. 2026-09-29 22:25 UTCEG score recompute
  69. 2026-09-29 21:37 UTCEG score recomputeFirst assessed: 7.1 HIGH
  70. 2026-09-29 21:33 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74225?
CVE-2026-74225 is a high-severity vulnerability; its CVE record was published on September 29, 2026. U-Boot before 2026.10-rc5 contains out-of-bounds memory access in dhcp6_parse_options() that fails to validate SERVERID and CLIENTID option lengths from DHCPv6 packets. Attackers on the local network can send crafted DHCPv6 ADVERTISE or REPLY packets during netboot to corrupt memory and crash the…
When was CVE-2026-74225 made public?
CVE-2026-74225 was made public on August 6, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 29, 2026. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-74225 actively exploited?
CVE-2026-74225 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74225?
CVE-2026-74225 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74225?
A fix for CVE-2026-74225 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74225 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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