CVE-2023-54334Public exploit

Arbitrary code execution via filename SEH overwrite

Published Jan 13, 2026 · Updated Jan 13, 2026

Stack-based buffer overflow in Explorer++ 1.3.5.531 allows local users to execute arbitrary code via a long filename argument. The executable accepts more than 396 argument characters without enforcing the stack-buffer boundary, overwriting the main thread's SEH chain and handler records. Exploitation requires local access and active interaction to launch the Windows executable with the crafted argument; successful control-flow corruption runs code in the process context.

CVSS severity7.0
High
EPSS probability0.58%
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 Explorer++ 1.3.5.531 allows local users to execute arbitrary code via a long filename argument. The executable accepts more than 396 argument characters without enforcing the stack-buffer boundary, overwriting the main thread's SEH chain and handler records. Exploitation requires local access and active interaction to launch the Windows executable with the crafted argument; successful control-flow corruption runs code in the process context.

The record

CVE
CVE-2023-54334
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Explorerplusplus
Product
Explorer++
Classifications
CWE-121, CWE-787, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=1.3.5.531

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Explorerplusplus · Explorer++version=1.3.5.531

Published CVSS scores

7.0VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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