CVE-2026-57454Public exploit

Heap disclosure and crash via unchecked virtual-text bounds

Published Jun 25, 2026 · Updated Jun 25, 2026

Out-of-bounds read in Vim 9.2.0320 through 9.2.0678 allows context-dependent attackers to crash Vim or read adjacent heap data. Text-property code converts an unchecked virtual-text offset into a pointer and reads tp_len plus one bytes beyond the available property data. Exploitation requires a user to open a crafted undo or swap file and restore, display, or query the malformed line.

CVSS severity6.8
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Vim 9.2.0320 through 9.2.0678 allows context-dependent attackers to crash Vim or read adjacent heap data. Text-property code converts an unchecked virtual-text offset into a pointer and reads tp_len plus one bytes beyond the available property data. Exploitation requires a user to open a crafted undo or swap file and restore, display, or query the malformed line.

The record

CVE
CVE-2026-57454
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Vim
Product
Vim
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 9.2.0320, < 9.2.0679

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Vim · Vimversion=>= 9.2.0320, < 9.2.0679

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
6.8GitHub, Inc.CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
5.3GitHubCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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