# CVE-2026-85456 — moos-ivp

> As of 2026-09-04, CVE-2026-85456 is a MEDIUM-severity vulnerability in moos-ivp, CVSS v3.1 5.5, EPSS 0.1% (3.7th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-85456 as of 2026-09-04; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-04

## What is CVE-2026-85456?

MOOS-IvP through 24.8.1 fails to properly validate variable names extracted from alog files in the SplitHandler, allowing attackers to write files outside the split directory. Attackers can supply crafted alog files with backslash sequences in variable names to escape the output directory and append to arbitrary files on Windows systems.

The record classifies CVE-2026-85456 under weakness class [CWE-22](https://intel.threadlinqs.com/cwe/CWE-22). Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs a user to take an action first, and has high impact on integrity. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 32 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 5.5 — MEDIUM (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N`)
- **CVSS v4.0 base score:** 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 3.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-03, last modified 2026-09-04

## Is CVE-2026-85456 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [moos-ivp](https://intel.threadlinqs.com/vendors/moos-ivp): moos-ivp

## How to fix CVE-2026-85456

No vendor patch reference has been recorded for CVE-2026-85456 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-85456

No threat campaign in the Threadlinqs corpus currently references CVE-2026-85456, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-05. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com — issue tracking](https://github.com/moos-ivp/moos-ivp/pull/137)
- [github.com — patch](https://github.com/moos-ivp/moos-ivp/commit/6f0619e905b325d6b88f76425673045c6e4f6f94)

**Technical analysis**

- [github.com — technical description](https://github.com/moos-ivp/moos-ivp/blob/1de9ae146cd63c209e8c3fd81611a4ed2472971b/ivp/src/lib_logutils/SplitHandler.cpp#L189)

**Third-party advisory**

- [vulncheck.com — third party advisory](https://www.vulncheck.com/advisories/moos-ivp-through-24.8.1-alog-splitting-path-traversal-on-windows)

**Issue tracking and product pages**

- [github.com — product](https://github.com/moos-ivp/moos-ivp)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-85456
Full detection coverage and IOCs for threats exploiting CVE-2026-85456 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp