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CVE-2026-102149

Kiteworks Email Protection Gateway Improper Access Control

No known exploitation. EPSS puts it in the 14th percentile. Fixed in 9.5.1.

CVSS 3.19.4CriticalEPSS percentile14th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix9.5.1Upgrade to this build

Published Updated Sources: CVE.org, NVD, CSAF

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Kiteworks Email Protection GatewayAffected: < 9.5.1Upgrade to: 9.5.1Stated by: CVE record
  • Accellion KiteworksAffected: < 9.5.1Upgrade to: 9.5.1Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

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What it is

From the CVE record

Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned to. This could allow an attacker to associate a certificate with another user's account, affecting the confidentiality and integrity of that account's encrypted mail and, where certificate-based login is enabled, potentially permitting unauthorized access to the account.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS14th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 14th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

9 events over 7 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Patch availablerecord updated, record updated
  3. Publishedweakness classified, att&ck mapped, record updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Scored 9.4 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability LowReduced performance or intermittent disruption of service

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 59 more references. See all after sign-in

In the news

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We'll flag the next CVE, public exploit or patch for Kiteworks, not every advisory.