---
id: "CVE-2026-105227"
kind: "vulnerability"
aliases: ["CVE-2026-105227"]
title: "Delta ISPSoft: remote attackers can disclose sensitive information"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "ISPSoft", "fixed": ["3.25"], "affected": "< 3.25", "ecosystem": "vendor"}]
ecosystems: []
tags: ["delta-ispsoft", "engineering-workstation", "industrial-control", "infrastructure", "plc", "windows"]
not_affected_if: ["ispsoft-3.25-or-later"]
published_at: "2026-10-16T03:17:58+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T03:48:58+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105227", "first_seen_at": "2026-10-23T21:57:12+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-25T03:48:58+00:00"}]
---

# Delta ISPSoft: remote attackers can disclose sensitive information

Out-of-bounds read (CWE-125) in Delta ISPSoft, the PLC programming software, before v3.25. Delta's advisory says to upgrade to v3.25 or later; there is no workaround. The CVSS vector requires user interaction, so the likely trigger is opening a crafted project file.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ISPSoft affected < 3.25 fixed 3.25

## How to check

In ISPSoft, open Help > About and read the version. Anything below 3.25 is affected.

## Fix

Upgrade ISPSoft to v3.25 or later from the Delta Download Center. Delta lists no workaround.

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-105227
- 2026-10-25T03:48:58+00:00 analyst — Delta PCSA-2026-00016 (primary): CWE-125 OOB read in ISPSoft < 3.25, fixed in 3.25; no workaround. Sibling CVE-2026-105228 same advisory. Client-side file parsing needing user interaction per third-party analysis (not vendor-stated); no exploitation/PoC found. X/social not searched.

## Documents

- [advisory] Delta-PCSA-2026-00016 ISPSoft Out-of-Bounds Read Vulnerability https://filecenter.deltaww.com/news/download/doc/Delta-PCSA-2026-00016_ISPSoft%20Out-of-Bounds%20Read%20Vulnerability.pdf
- [describes] CVE Record CVE-2026-105227 https://www.cve.org/cverecord?id=CVE-2026-105227

## From the sources

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Delta ISPSoft.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_