# CVE-2026-59117 — Microsoft Windows Terminal App

> As of 2026-07-17, CVE-2026-59117 is a HIGH-severity vulnerability in Microsoft Windows Terminal App, CVSS v3.1 7.5, EPSS 0.4% (36.4th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-59117, most recently “Microsoft July 2026 Patch Tuesday: 570 Vulnerabilities Fixed, Including 2 Actively Exploited Zero-Days (CVE-2026-56164, CVE-2026-56155)”.

**Last updated:** 2026-07-17

## What is CVE-2026-59117?

Integer overflow or wraparound in Windows Terminal allows an unauthorized attacker to execute code over a network.

The record classifies CVE-2026-59117 under weakness class [CWE-190](https://cwe.mitre.org/data/definitions/190.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 58 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.5 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 36.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-16, last modified 2026-07-17

## Is CVE-2026-59117 being exploited?

It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Microsoft**: Windows Terminal App

## How to fix CVE-2026-59117

No vendor patch reference has been recorded for CVE-2026-59117 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-2026-59117

1 tracked threat in the Threadlinqs corpus references CVE-2026-59117, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Microsoft July 2026 Patch Tuesday: 570 Vulnerabilities Fixed, Including 2 Actively Exploited Zero-Days (CVE-2026-56164, CVE-2026-56155)](https://intel.threadlinqs.com/threat/TL-2026-1325) — CRITICAL · 2026-07-14

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-07-18. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [msrc.microsoft.com — vendor advisory](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59117)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-59117
Full detection coverage and IOCs for threats exploiting CVE-2026-59117 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp