CVE-2026-4480

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 13.9%, top 4% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 14%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
14%
EPSS %ILE
96%
KEV
Not listed

Published

May 26, 2026

Last Modified

July 24, 2026

Advisory Details (13)

Auto-updated Jul 24, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support

https://access.redhat.com/errata/RHSA-2026:28058
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support

https://access.redhat.com/errata/RHSA-2026:28057
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2026:28056
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:28055
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:28054
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:28053
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:25979
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:25049
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:22963
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:22644
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-4480
generic

16033 – (CVE-2026-4480) CVE-2026-4480 [SECURITY] Unauthenticated Remote Code Execution

https://bugzilla.samba.org/show_bug.cgi?id=16033
redhat Patch Available

2452232 – (CVE-2026-4480) CVE-2026-4480 samba: Samba: Remote Code Execution in printing subsystem via unescaped job description

Affected: Red Hat Enterprise Linux 8

https://bugzilla.redhat.com/show_bug.cgi?id=2452232

Vendor Advisories for CVE-2026-4480(12)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwinbind (2:4.23.6+dfsg-1ubuntu2.1) @ resolute2026-07-26ubuntu
redhatsamba-0:4.19.4-105.el9_4.42026-06-23redhat
redhatsamba-0:4.13.3-12.el8_4.12026-06-23redhat
redhatsamba-0:4.10.16-26.el7_9.12026-06-23redhat
redhatsamba-0:4.21.3-114.el10_0.12026-06-23redhat
redhatsamba-0:4.15.5-16.el8_6.12026-06-23redhat
redhatsamba-0:4.17.5-7.el8_8.12026-06-23redhat
redhatsamba-0:4.17.5-105.el9_2.52026-06-23redhat
redhatsamba-0:4.21.3-14.el9_6.12026-06-15redhat
redhatsamba-0:4.23.5-10.el9_82026-06-10redhat
redhatsamba-0:4.23.5-109.el10_22026-06-03redhat
redhatsamba-0:4.19.4-16.el8_102026-06-03redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 49× 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 190 total refreshes for this CVE.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 07:48 UTCEG score recompute
  3. 2026-07-26 07:48 UTCVendor advisory
  4. 2026-07-26 07:48 UTCGHSA enrichment
  5. 2026-07-25 14:18 UTCEPSS rescore
  6. 2026-07-24 14:18 UTCEPSS rescore
  7. 2026-07-23 14:18 UTCEPSS rescore
  8. 2026-07-23 03:15 UTCEG score recompute▲ 1.30
  9. 2026-07-22 14:08 UTCEPSS rescore
  10. 2026-07-21 15:25 UTCEPSS rescore
  11. 2026-07-20 17:08 UTCEPSS rescore
  12. 2026-07-19 14:31 UTCEPSS rescore
  13. 2026-07-19 14:31 UTCEPSS rescore
  14. 2026-07-19 07:52 UTCOSV refresh
  15. 2026-07-19 02:29 UTCEPSS rescore
  16. 2026-07-18 10:04 UTCEPSS rescore
  17. 2026-07-16 17:03 UTCEPSS rescore
  18. 2026-07-15 16:57 UTCEPSS rescore
  19. 2026-07-15 16:57 UTCEPSS rescore
  20. 2026-07-15 02:25 UTCNVD updateCVSS v3 → 9.8
  21. 2026-07-15 02:00 UTCEPSS rescore
  22. 2026-07-15 02:00 UTCEPSS rescore
  23. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 9
  24. 2026-07-13 22:31 UTCEPSS rescore
  25. 2026-07-13 06:13 UTCEPSS rescore
Show 75 more
  1. 2026-07-13 06:13 UTCEPSS rescore
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-09 19:10 UTCEPSS rescore
  5. 2026-07-08 15:16 UTCEPSS rescore
  6. 2026-07-07 13:46 UTCEPSS rescore
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-01 15:07 UTCEPSS rescore
  11. 2026-07-01 14:09 UTCVendor advisory
  12. 2026-07-01 14:09 UTCGHSA enrichment
  13. 2026-06-30 23:22 UTCEPSS rescore
  14. 2026-06-29 14:59 UTCVendor advisory
  15. 2026-06-29 14:59 UTCGHSA enrichment
  16. 2026-06-28 23:43 UTCVendor advisory
  17. 2026-06-28 23:43 UTCGHSA enrichment
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-28 07:33 UTCVendor advisory
  20. 2026-06-28 07:33 UTCGHSA enrichment
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-28 04:56 UTCEPSS rescore
  23. 2026-06-27 18:58 UTCVendor advisory
  24. 2026-06-27 18:58 UTCGHSA enrichment
  25. 2026-06-27 07:07 UTCVendor advisory
  26. 2026-06-27 07:07 UTCGHSA enrichment
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-26 17:57 UTCVendor advisory
  29. 2026-06-26 17:57 UTCGHSA enrichment
  30. 2026-06-25 23:11 UTCVendor advisory
  31. 2026-06-25 23:11 UTCGHSA enrichment
  32. 2026-06-25 13:49 UTCEPSS rescore
  33. 2026-06-25 12:04 UTCVendor advisory
  34. 2026-06-25 12:04 UTCGHSA enrichment
  35. 2026-06-24 14:05 UTCEPSS rescore
  36. 2026-06-23 21:33 UTCEPSS rescore
  37. 2026-06-23 21:33 UTCEPSS rescore
  38. 2026-06-23 09:33 UTCNVD updateCVSS v3 → 9.8
  39. 2026-06-23 08:05 UTCMITRE cvelistV5CVSS v3 → 9
  40. 2026-06-23 05:34 UTCNVD updateCVSS v3 → 9.8
  41. 2026-06-23 03:50 UTCMITRE cvelistV5CVSS v3 → 9
  42. 2026-06-23 03:31 UTCNVD updateCVSS v3 → 9.8
  43. 2026-06-23 01:45 UTCMITRE cvelistV5CVSS v3 → 9
  44. 2026-06-22 14:25 UTCEPSS rescore
  45. 2026-06-22 14:25 UTCEPSS rescore
  46. 2026-06-21 14:56 UTCEPSS rescore
  47. 2026-06-21 14:56 UTCEPSS rescore
  48. 2026-06-21 01:59 UTCEPSS rescore
  49. 2026-06-21 01:59 UTCEPSS rescore
  50. 2026-06-19 19:26 UTCEPSS rescore
  51. 2026-06-19 19:26 UTCEPSS rescore
  52. 2026-06-18 17:52 UTCEPSS rescore
  53. 2026-06-18 17:52 UTCEPSS rescore
  54. 2026-06-17 19:20 UTCVendor advisory
  55. 2026-06-17 19:20 UTCGHSA enrichment
  56. 2026-06-17 17:53 UTCEPSS rescore
  57. 2026-06-17 08:18 UTCVendor advisory
  58. 2026-06-17 08:18 UTCGHSA enrichment
  59. 2026-06-16 21:15 UTCVendor advisory
  60. 2026-06-16 21:15 UTCGHSA enrichment
  61. 2026-06-16 17:53 UTCEPSS rescore
  62. 2026-06-16 10:15 UTCVendor advisory
  63. 2026-06-16 10:15 UTCGHSA enrichment
  64. 2026-06-15 22:29 UTCVendor advisory
  65. 2026-06-15 22:29 UTCGHSA enrichment
  66. 2026-06-15 17:49 UTCEPSS rescore
  67. 2026-06-15 17:49 UTCEPSS rescore
  68. 2026-06-15 07:59 UTCVendor advisory
  69. 2026-06-15 07:58 UTCGHSA enrichment
  70. 2026-06-14 23:18 UTCEPSS rescore
  71. 2026-06-14 20:58 UTCVendor advisory
  72. 2026-06-14 20:58 UTCGHSA enrichment
  73. 2026-06-14 09:58 UTCVendor advisory
  74. 2026-06-14 09:58 UTCGHSA enrichment
  75. 2026-06-13 23:00 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCTheCyberGeek/CVE-2026-4480-PoC
    First seen Jun 5, 2026
    Open source ↗
  • Nucleijavascript/cves/2026/CVE-2026-4480.yaml
    First seen Jan 1, 2026

    Samba Printing Subsystem - Remote Code Execution

    Open source ↗

Frequently asked(5)

What is CVE-2026-4480?
CVE-2026-4480 is a critical vulnerability published on May 26, 2026. A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by…
When was CVE-2026-4480 disclosed?
CVE-2026-4480 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-4480 actively exploited?
CVE-2026-4480 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14% probability of exploitation in the next 30 days, which ranks it in the top 3.8% of all scored CVEs.
What is the CVSS score of CVE-2026-4480?
CVE-2026-4480 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-4480?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4480, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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