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CVE-2026-102103

Accellion Kiteworks server-side request forgery (SSRF)

9.1 CRITICALEPSS 0.71%
  1. Published30 Sept 2026

Description

Kiteworks Email Protection Gateway before version 9.5.0 is vulnerable to Server-Side Request Forgery (SSRF). A server-side request forgery (SSRF) weakness in Kiteworks Email Protection Gateway could allow a remote, unauthenticated attacker to induce the gateway to issue crafted requests to internal or otherwise unintended network destinations. The requests are triggered while the gateway retrieves a certificate revocation list in an inbound message. Depending on the services reachable from the gateway, this could disclose sensitive internal information or disrupt gateway operation.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Accellion Kiteworks< 9.5.0

Remediation

Fixed in
Accellion Kiteworks≥ 9.5.0

References

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Frequently asked

Is CVE-2026-102103 being actively exploited?

CVE-2026-102103 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.71%.

How severe is CVE-2026-102103?

CVE-2026-102103 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.71% probability of exploitation.

Which products are affected by CVE-2026-102103?

Affected products include Accellion Kiteworks.

How do I fix CVE-2026-102103?

Upgrade affected software to a fixed version, for example Accellion Kiteworks 9.5.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-102103 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.