Patch tracker / CVE reference / CVE-2026-52859

CVE-2026-52859

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS under 1%.

No vendor fix is mapped yet. This page refreshes daily and will name the patch the day one is published.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

High severity vulnerability.

All about CVE-2026-52859: whether it is exploited, how to fix it, its change history, and the questions admins ask.

How to fix CVE-2026-52859 Change history Admin questions

A security vulnerability affecting a Microsoft product.

High

Risk summary

CVSS base

Severity

High

Actively exploited

Not listed

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Senserva AI Opinion and rich prompt for CVE-2026-52859

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2026-52859 (source: https://senserva.com/cve/CVE-2026-52859.html, data from CISA KEV and NVD, refreshed three times a day (5 AM, 12:30 PM, and 7 PM US Central)):
- CVE-2026-52859: High severity vulnerability
- Vim: Out-of-bounds Read in Terminal Screen Snapshot
- Actively exploited (CISA KEV): no
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for CVE-2026-52859

Published

2026-06-13

Last revised

2026-06-13

Changes tracked

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

How to fix CVE-2026-52859

Update Vim to version 9.2.0565 or later. (Fixed-version data from NVD.) Where a workaround exists, apply it only until the update is deployed, not as a substitute.

Vendor advisory NVD detail

Common questions about CVE-2026-52859

Is CVE-2026-52859 actively exploited?

It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. That can change: unexploited CVEs regularly get weaponized months after disclosure, which is why patching on your normal cadence matters.

What fixes CVE-2026-52859?

Update Vim to version 9.2.0565 or later. Fixed-version data from NVD; the vendor advisory linked on this page has the details.

Which products are affected by CVE-2026-52859?

See the vendor security advisory for the affected product list.

Can I ask my own AI about CVE-2026-52859?

Yes. This page includes a free, ready-to-paste AI prompt with CVE-2026-52859's key facts: severity, CVSS, CISA KEV status, and the affected products. Copy it into Claude, ChatGPT, or Copilot for a triage plan.

Authoritative references

CVE record NVD detail

Every Microsoft CVE and the patches that fix it, ranked by real-world risk: the Microsoft Patch Tracker. The full searchable CVE reference: CVE and vulnerability management.