CVE-2025-66487 Multiple vulnerabilities have been addressed in IBM Aspera Shares

Low 2.7 Published 1 Apr 2026 Updated 2 Apr 2026

Authenticated users can flood email services due to missing rate limits, causing denial of service in IBM Aspera Shares.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-66487?

CVE-2025-66487 is a low-severity denial of service vulnerability in IBM Aspera Shares, published on 1 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

IBM Aspera Shares 1.9.9 through 1.11.0 does not properly rate limit the frequency that an authenticated user can send emails, which could result in email flooding or a denial of service.

Weakness: CWE-770

Which versions are affected by CVE-2025-66487?

It affects 1 product.

Products include Ibm Aspera Shares.

How do I fix CVE-2025-66487?

No fix has been published for CVE-2025-66487 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-66487 being exploited?

There is no known exploitation of CVE-2025-66487 in the wild and no public exploit code.

Sources

Also known as GHSA-239w-6x3x-fvrr.