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TI-2026-65271 Aliases CVE-2026-102135

Kiteworks Email Protection Gateway Deserialization of Untrusted Data

Priority LOW 34CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

On a Kiteworks Email Protection Gateway cluster with database replication enabled, a party trusted by the cluster could submit a crafted serialized object that was deserialized without sufficient validation, potentially allowing code execution as the gateway service account. Replication is disabled by default, and exploitation requires control of a trusted cluster peer or administrative access to the appliance.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01276 70th percentileScored 2026-11-07
Fix Fixed Email Protection Gateway (Kiteworks): 9.5.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AccellionEmail Protection Gatewaybefore 9.5.19.5.1Patch availableCNA
  • Email Protection Gateway VendorAccellion Affected before 9.5.1 Fixed in 9.5.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*before 9.5.1VulnerableAccellion
  • cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:* Versions before 9.5.1 Vulnerable ·Accellion

Remediation

  • Fix · CNA Email Protection Gateway (Kiteworks) Fixed in 9.5.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Kiteworks Email Protection Gateway 9.5.1

    9 records Highest priority Priority MEDIUM 1 MEDIUM, 8 LOW

    Other records, highest priority first

    • TI-2026-65284 Kiteworks Email Protection Gateway Improper Access ControlPriority MEDIUM 48
    • TI-2026-65279 Kiteworks Email Protection Gateway Unrestricted Upload of File with Dangerous TypePriority LOW 39
    • TI-2026-65264 Kiteworks Email Protection Gateway Improper AuthenticationPriority LOW 38
    Show all 9 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-102135
  2. 2026-10-09 EPSS moved to the 50th–90th percentile

References

Advisory 2

  • TI-2021-11694 Accellion Kiteworks before 7.4.0 allows an authenticated user to perform SQL Injection via LDAPGroup Search. CVSS 3.1HIGH 8.8
  • TI-2026-65251 Kiteworks Core Authentication Bypass in the Password Reset Workflow CVSS 3.1CRITICAL 9.8
  • TI-2026-65284 Kiteworks Email Protection Gateway Improper Access Control CVSS 3.1CRITICAL 9.4
  • TI-2026-65241 Kiteworks Email Protection Gateway server-side request forgery CVSS 3.1CRITICAL 9.1
  • TI-2026-65242 Kiteworks Email Protection Gateway improper authentication CVSS 3.1CRITICAL 9.1
  • TI-2026-65238 Kiteworks Email Protection Gateway server-side request forgery CVSS 3.1CRITICAL 9.1
See all 81 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences