CVE-2026-57455: Vim: Stack out-of-bounds write in `spell_soundfold_sofo()` via an over-length `soundfold()` argument

highCVSS 7.8CVE-2026-57455

CSIRTS triage

vendor: null product: VimOtheraffected: null

What: There is a stack out-of-bounds write in the spell_soundfold_sofo() function.
Who is affected: Deployments using Vim with the affected spell functionality.
Urgency: Remediation is urgent due to the high severity rating of 7.8.
Action: Apply the patch for CVE-2026-57455.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57455

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-574550.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57455	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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