CVE-2026-86514Public exploitNetwork attack vector

Application crash via unbounded sscanf scansets

Published Sep 8, 2026 · Updated Sep 8, 2026

Stack-based buffer overflow in vgmstream r2117 allows context-dependent attackers to crash an application via a crafted TXTH or TXTP file. The TXTH and TXTP parsers use unbounded sscanf scansets to copy attacker-controlled keys, values, and filenames into fixed-size stack arrays before validation. A user or integrating application must parse the file; the overwrite terminates the process and has code-execution potential.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in vgmstream r2117 allows context-dependent attackers to crash an application via a crafted TXTH or TXTP file. The TXTH and TXTP parsers use unbounded sscanf scansets to copy attacker-controlled keys, values, and filenames into fixed-size stack arrays before validation. A user or integrating application must parse the file; the overwrite terminates the process and has code-execution potential.

The record

CVE
CVE-2026-86514
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
vgmstream
Product
vgmstream
Classifications
CWE-119, CWE-121, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=r2117

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

vgmstream · vgmstreamversion=r2117

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-119Memory Corruption
CWE-121Stack-based Buffer Overflow
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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