CVE-2026-75987Public exploitNetwork attack vector

Unauthenticated code execution via unsafe deserialization

Published Aug 19, 2026 · Updated Aug 19, 2026

Deserialization of untrusted data in the unit/node server in SPLWare esProc 20260507 allows remote attackers to execute code via crafted serialized objects. SocketData.holdCommunicateStreamServer() wraps the raw socket input in ObjectInputStream, and UnitWorker.run() calls SocketData.read() so readUnshared() deserializes attacker-controlled data before any authentication or IP allowlist check. Reachability to the listener, which defaults to TCP port 8281, is required; a usable gadget chain on the server classpath is needed for code execution, while crafted object graphs can still interrupt service.

CVSS severity6.9
Medium
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization of untrusted data in the unit/node server in SPLWare esProc 20260507 allows remote attackers to execute code via crafted serialized objects. SocketData.holdCommunicateStreamServer() wraps the raw socket input in ObjectInputStream, and UnitWorker.run() calls SocketData.read() so readUnshared() deserializes attacker-controlled data before any authentication or IP allowlist check. Reachability to the listener, which defaults to TCP port 8281, is required; a usable gadget chain on the server classpath is needed for code execution, while crafted object graphs can still interrupt service.

The record

CVE
CVE-2026-75987
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Raqsoft Ltd.
Product
esProc
Classifications
CWE-502, CWE-20, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=20260507

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Raqsoft Ltd. · esProcversion=20260507

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
6.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
CWE-20Improper Input Validation
T1210Exploitation of Remote Services

Public exploit references

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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