CVE-2026-81939

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing functionality allows an attacker to extract files outside the intended destination directory using a specially crafted archive.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Security Advisory

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0015

Vendor Advisories for CVE-2026-81939(1)

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 52× in last 7d / 157× 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 157 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-81939?
CVE-2026-81939 is a critical vulnerability published on September 4, 2026. A Zip Slip vulnerability in the SonicWall Network Security Manager (NSM) On-Prem file upload and archive processing functionality allows an attacker to extract files outside the intended destination directory using a specially crafted archive.
When was CVE-2026-81939 disclosed?
CVE-2026-81939 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-81939 actively exploited?
CVE-2026-81939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.8% of all scored CVEs.
What is the CVSS score of CVE-2026-81939?
CVE-2026-81939 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-81939?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-81939, 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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