Quick answers
- Is CVE-2026-40635 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-40635 being exploited in the wild.
- How severe is CVE-2026-40635?
- Medium severity, with a CVSS score of 5.4, published 9 September 2026.
- Which products and versions are affected?
- Dell PowerScale OneFS 9.12.0.0 through 9.13.1.0.
- Is there a fix for CVE-2026-40635?
- A patch was published on 2026-09-09: Version 9.13.1.1 or later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-40635 attacked?
- It is in a network appliance.
- Am I affected by CVE-2026-40635?
- Check whether you run Dell PowerScale OneFS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
CVE-2026-40635 is an insecure temporary file vulnerability in Dell PowerScale OneFS versions 9.12.0.0 through 9.13.1.0. The vulnerability can be exploited by a low-privileged remote attacker over the network without user interaction, requiring only valid credentials (PR:L). Exploitation leads to denial of service (availability impact) and information tampering (integrity impact). Patches are available in version 9.13.1.1 or later according to the remediation guidance.
Affected products
- Dell PowerScale OneFS 9.12.0.0 through 9.13.1.0
Timeline
- 2026-09-09: disclosed
- 2026-09-09: patched: Version 9.13.1.1 or later