Quick answers
- Is CVE-2026-86377 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86377 being exploited in the wild.
- How severe is CVE-2026-86377?
- High severity, with a CVSS score of 7.6, published 28 October 2026.
- Which products and versions are affected?
- Dell PowerProtect Data Domain Feature Release 7.7.1.0–8.8, LTS2024 7.13.1.0–7.13.1.80, LTS2025 8.3.1.0–8.3.1.40, LTS2026 8.6.1.0–8.6.1.20.
- Is there a fix for CVE-2026-86377?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-86377 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-86377?
- Check whether you run Dell PowerProtect Data Domain 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
An out-of-bounds write vulnerability in Dell PowerProtect Data Domain allows a remote, low-privileged attacker to write beyond allocated buffer boundaries. Successful exploitation results in denial of service by corrupting memory and crashing the affected service. The vulnerability requires network access and valid (low-privilege) authentication.
Affected products
- Dell PowerProtect Data Domain Feature Release 7.7.1.0–8.8, LTS2024 7.13.1.0–7.13.1.80, LTS2025 8.3.1.0–8.3.1.40, LTS2026 8.6.1.0–8.6.1.20
Timeline
- 2026-10-28: disclosed