CVE-2026-40635

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-09-09. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: None knownExposed: 0

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

Dell PowerScale OneFS versions 9.12.0.0 through 9.13.1.0 contain an Insecure Temporary File vulnerability. A low privileged remote attacker could potentially exploit this vulnerability, leading to denial of service and information tampering.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

DSA-2026-360: Security Update for Dell PowerScale OneFS Multiple Vulnerabilities | Dell US

https://www.dell.com/support/kbdoc/en-us/000505684/dsa-2026-360-security-update-for-dell-powerscale-onefs-multiple-vulnerabilities

Vendor Advisories for CVE-2026-40635(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 22× in last 7d / 36× 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.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 12:45 UTCEG score recompute
  4. 2026-09-18 12:45 UTCGHSA enrichment
  5. 2026-09-17 19:30 UTCEPSS rescore
  6. 2026-09-17 14:15 UTCGHSA enrichment
  7. 2026-09-16 15:43 UTCEG score recompute
  8. 2026-09-16 15:43 UTCGHSA enrichment
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 13:53 UTCEG score recompute
  11. 2026-09-16 13:53 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 15:20 UTCEG score recompute
  14. 2026-09-15 15:20 UTCGHSA enrichment
  15. 2026-09-15 03:11 UTCEPSS rescore
  16. 2026-09-14 16:50 UTCGHSA enrichment
  17. 2026-09-13 18:21 UTCEG score recompute
  18. 2026-09-13 18:21 UTCGHSA enrichment
  19. 2026-09-13 16:47 UTCEPSS rescore
  20. 2026-09-12 19:52 UTCEG score recompute
  21. 2026-09-12 19:52 UTCGHSA enrichment
  22. 2026-09-12 15:01 UTCEPSS rescore
  23. 2026-09-11 21:23 UTCEG score recompute
  24. 2026-09-11 21:23 UTCGHSA enrichment
  25. 2026-09-11 20:47 UTCEG score recompute
Show 11 more
  1. 2026-09-11 20:47 UTCGHSA enrichment
  2. 2026-09-11 17:35 UTCEG score recompute
  3. 2026-09-11 17:35 UTCGHSA enrichment
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-11 09:37 UTCEPSS rescore
  6. 2026-09-10 19:05 UTCGHSA enrichment
  7. 2026-09-09 20:35 UTCEG score recompute
  8. 2026-09-09 20:35 UTCGHSA enrichment
  9. 2026-09-09 17:28 UTCEG score recompute
  10. 2026-09-09 16:37 UTCEG score recompute
  11. 2026-09-09 16:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-40635?
CVE-2026-40635 is a medium vulnerability published on September 9, 2026. Dell PowerScale OneFS versions 9.12.0.0 through 9.13.1.0 contain an Insecure Temporary File vulnerability. A low privileged remote attacker could potentially exploit this vulnerability, leading to denial of service and information tampering.
When was CVE-2026-40635 disclosed?
CVE-2026-40635 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40635 actively exploited?
CVE-2026-40635 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 85.8% of all scored CVEs.
What is the CVSS score of CVE-2026-40635?
CVE-2026-40635 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-40635?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40635, 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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