CVE-2023-50965Public exploitNetwork attack vector

Service crash via unchecked URI copy

Published Dec 17, 2023 · Updated Aug 2, 2024

Stack-based buffer overflow in MicroHttpServer through 4398570 allows remote attackers to crash the server via a long HTTP URI. _ReadStaticFiles uses memcpy to append the complete URI to a fixed 128-byte stack path buffer without checking the destination capacity. Static-file handling must be enabled and reachable; the published proof of concept demonstrates process termination under AddressSanitizer, while code execution is reported as a potential consequence.

CVSS severity9.8
Critical
EPSS probability1.53%
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 MicroHttpServer through 4398570 allows remote attackers to crash the server via a long HTTP URI. _ReadStaticFiles uses memcpy to append the complete URI to a fixed 128-byte stack path buffer without checking the destination capacity. Static-file handling must be enabled and reachable; the published proof of concept demonstrates process termination under AddressSanitizer, while code execution is reported as a potential consequence.

The record

CVE
CVE-2023-50965
Published
Dec 17, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS: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 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-787Out-of-bounds Write
T1499.004Endpoint Denial of Service Application or System Exploitation
T1190Exploit Public-Facing Application

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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