CVE-2026-102144: A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote at

Q: How do I fix CVE-2026-102144?

kiteworks: upgrade to 9.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-102144 being exploited?

CVE-2026-102144 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-102144 affect?

CVE-2026-102144 affects kiteworks. Severity is medium (CVSS 5.3). A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote attacker to repeatedly trigger a comparatively expensive server-side operation, causing a partial denial of service.

Q: How urgent is CVE-2026-102144?

Priority 31/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-102144 is a medium-severity flaw (CVSS 5.3) affecting kiteworks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote attacker to repeatedly trigger a comparatively expensive server-side operation, causing a partial denial of service.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-306, CWE-400
Published	2026-09-30
Last modified	2026-10-07

Publisher (CNA): Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government · Vendor: accellion

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

Am I affected?

Timeline

2026-09-30 21:17 UTCPublished CVE record published
2026-10-07 15:02 UTCUpdated Record last modified

accellion kiteworks UPGRADE

Affected: < 9.5.1

Fixed in: 9.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kiteworks || rpm -q kiteworks || kiteworks --version

2. UPGRADE to 9.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kiteworks

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kiteworks

Note

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

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-2026-102144?

kiteworks: upgrade to 9.5.1. Exact commands for each OS are on this page.

Is CVE-2026-102144 being exploited?

CVE-2026-102144 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-2026-102144 affect?

CVE-2026-102144 affects kiteworks. Severity is medium (CVSS 5.3). A resource exhaustion vulnerability in Kiteworks Email Protection Gateway allowed an unauthenticated remote attacker to repeatedly trigger a comparatively expensive server-side operation, causing a partial denial of service.

How urgent is CVE-2026-102144?

Priority 31/100. Remotely exploitable, no login, no user action

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References

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