CVE-2026-23746Network attack vector

Unauthenticated RCE via unsafe .NET Remoting channel

Published Jan 15, 2026 · Updated Jan 15, 2026

Remote code execution in Entrust Instant Financial Issuance 5.x and before 6.10.5 or 6.11.1 allows remote attackers to compromise servers. The SmartCardController service registers a TCP remoting channel with unsafe formatter settings that accept untrusted remoting object invocations. Network access to the remoting port requires no authentication and exposes arbitrary file reads, outbound authentication coercion, file writes, and code execution.

CVSS severity9.3
Critical
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Entrust Instant Financial Issuance 5.x and before 6.10.5 or 6.11.1 allows remote attackers to compromise servers. The SmartCardController service registers a TCP remoting channel with unsafe formatter settings that accept untrusted remoting object invocations. Network access to the remoting port requires no authentication and exposes arbitrary file reads, outbound authentication coercion, file writes, and code execution.

The record

CVE
CVE-2026-23746
Published
Jan 15, 2026
Updated
Jan 15, 2026
Vendor
Entrust Corporation
Product
Instant Financial Issuance
Classifications
CWE-502, CWE-306, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.x
  2. Affected versionversion=6.0 <6.10.5
  3. Affected versionversion=6.0 <6.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Entrust Corporation · Instant Financial Issuanceversion=5.x; version=6.0 <6.10.5; version=6.0 <6.11.1

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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