CVE-2023-49992Public exploit

Application crash via unchecked RemoveEnding copy

Published Dec 12, 2023 · Updated Nov 4, 2025

Stack buffer overflow in eSpeak NG 1.52-dev allows local users to crash the application by processing a crafted text file. RemoveEnding calculates a word length from attacker-controlled text and passes it to memcpy without limiting the copy to the 160-byte word_copy stack buffer. Exploitation requires user interaction; the public proof of concept demonstrates a 393-byte stack write and application abort, not code execution.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in eSpeak NG 1.52-dev allows local users to crash the application by processing a crafted text file. RemoveEnding calculates a word length from attacker-controlled text and passes it to memcpy without limiting the copy to the 160-byte word_copy stack buffer. Exploitation requires user interaction; the public proof of concept demonstrates a 393-byte stack write and application abort, not code execution.

The record

CVE
CVE-2023-49992
Published
Dec 12, 2023
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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-787Out-of-bounds Write
T1204.002User Execution: Malicious 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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