CVE-2025-34414Network attack vector

Unauthenticated code execution via permissive remoting formatters

Published Dec 9, 2025 · Updated May 14, 2026

Unsafe deserialization in Entrust Instant Financial Issuance 5.x, before 6.10.5, and before 6.11.1 allows remote attackers to execute code. The default Legacy Remoting Service registers a TCP channel whose SOAP and binary formatters accept serialized objects at TypeFilterLevel=Full through exposed ObjectURI endpoints. Network access to the remoting port requires no authentication and enables arbitrary file reads, outbound-authentication coercion, file writes, and host compromise.

CVSS severity9.3
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Entrust Instant Financial Issuance 5.x, before 6.10.5, and before 6.11.1 allows remote attackers to execute code. The default Legacy Remoting Service registers a TCP channel whose SOAP and binary formatters accept serialized objects at TypeFilterLevel=Full through exposed ObjectURI endpoints. Network access to the remoting port requires no authentication and enables arbitrary file reads, outbound-authentication coercion, file writes, and host compromise.

The record

CVE
CVE-2025-34414
Published
Dec 9, 2025
Updated
May 14, 2026
Vendor
Entrust Corporation
Product
Instant Financial Issuance
Classifications
CWE-306, CWE-502, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=5.0
  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=5.0; 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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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