CVE-2025-66487: IBM Aspera Shares 1.9.9 through 1.11.0 does not properly rate limit the frequency that an authenticated user c

Routine

LOW 2.7UPGRADE

CVE-2025-66487 is a low-severity flaw (CVSS 2.7) affecting aspera shares. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.7 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-04-01
Last modified	2026-10-07

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 23:17 UTCPublished CVE record published
2026-10-07 09:10 UTCUpdated Record last modified

ibm aspera shares UPGRADE

Affected: >= 1.9.9 and < 1.11.1

Fixed in: 1.11.1

Safe to downgrade to: a release before 1.9.9

1. Check installed version

apt-cache policy aspera-shares || rpm -q aspera-shares || aspera-shares --version

2. UPGRADE to 1.11.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade aspera-shares

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade aspera-shares

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.9.9 (Debian / Ubuntu)

apt-cache madison aspera-shares sudo apt install aspera-shares=<VERSION_BEFORE_1.9.9> sudo apt-mark hold aspera-shares

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list aspera-shares sudo dnf downgrade aspera-shares-<VERSION_BEFORE_1.9.9> sudo dnf versionlock add aspera-shares

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-66487?

aspera shares: upgrade to 1.11.1. Exact commands for each OS are on this page.

Is CVE-2025-66487 being exploited?

CVE-2025-66487 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-66487 affect?

CVE-2025-66487 affects aspera shares. Severity is low (CVSS 2.7). 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.

How urgent is CVE-2025-66487?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2025-13916 MEDIUM 5.9 UPGRADE IBM Aspera Shares 1.9.9 through 1.11.0 uses weaker than expected cryptographic algorithms that could allow an
CVE-2025-66483 MEDIUM 6.3 UPGRADE IBM Aspera Shares 1.9.9 through 1.11.0 does not invalidate session after a password reset which could allow an
CVE-2025-66484 MEDIUM 5.5 UPGRADE IBM Aspera Shares 1.9.9 through 1.11.0 is vulnerable to stored cross-site scripting
CVE-2025-66485 MEDIUM 5.4 UPGRADE IBM Aspera Shares 1.9.9 through 1.11.0 is vulnerable to HTTP header injection, caused by improper validation o
CVE-2025-66486 MEDIUM 4.8 UPGRADE IBM Aspera Shares 1.9.9 through 1.11.0 is vulnerable to HTML injection

References

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