CVE-2026-4480

CRITICALNVD 9.88.5▼
EchelonGraph scoreMEDIUM confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-26. NVD baseline CVSS 9.8; sources differ by 1.3.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this weekElevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 13%CVSS: 9.8Exploit: NoneExposed: 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
8.5(medium)
EPSS
95.8%
KEV
Not listed

Published

May 26, 2026

Last Modified

July 15, 2026

Advisory Details (13)

Auto-updated Jul 16, 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 (2:4.19.5+dfsg-4ubuntu9.6) @ noble2026-07-01ubuntu
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 12× in last 7d / 81× 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 219 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 15, 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 95.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-4480?
CVE-2026-4480 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.5.
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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