CVE-2024-34199Public exploitNetwork attack vector

Remote server crash via unbounded request-line buffering

Published May 10, 2024 · Updated Jan 5, 2026

Heap-based buffer overflow in Ritlabs TinyWeb Server 1.94 and earlier allows remote attackers to crash the server with an oversized request line. The TCollector.Collect function in SrvMain.pas repeatedly expands CollectStr without a size limit while waiting for CRLF to terminate the line. A single unauthenticated TCP connection can terminate a worker thread and leak its allocation; repeated requests exhaust the 32-bit process and stop service.

CVSS severity8.6
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Ritlabs TinyWeb Server 1.94 and earlier allows remote attackers to crash the server with an oversized request line. The TCollector.Collect function in SrvMain.pas repeatedly expands CollectStr without a size limit while waiting for CRLF to terminate the line. A single unauthenticated TCP connection can terminate a worker thread and leak its allocation; repeated requests exhaust the 32-bit process and stop service.

The record

CVE
CVE-2024-34199
Published
May 10, 2024
Updated
Jan 5, 2026
Vendor
Ritlabs
Product
TinyWeb Server
Classifications
CWE-787, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 5, 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=0 <=1.94

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ritlabs · TinyWeb Serverversion=0 <=1.94

Published CVSS scores

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.003Application Exhaustion Flood

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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