CVE-2024-22087Public exploitNetwork attack vector

Unauthenticated code execution via unbounded URI copy

Published Jan 5, 2024 · Updated Jan 23, 2026

Stack-based buffer overflow in Pico HTTP Server in C through f3b69a6 allows remote attackers to execute code via a long URI. The catch-all GET route in main.c uses sprintf to concatenate PUBLIC_DIR and the untrusted URI into a 255-byte stack buffer without a length bound. No authentication or user interaction is required; an oversized HTTP request path overwrites stack memory, enabling process control or a crash.

CVSS severity9.8
Critical
EPSS probability1.60%
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 Pico HTTP Server in C through f3b69a6 allows remote attackers to execute code via a long URI. The catch-all GET route in main.c uses sprintf to concatenate PUBLIC_DIR and the untrusted URI into a 255-byte stack buffer without a length bound. No authentication or user interaction is required; an oversized HTTP request path overwrites stack memory, enabling process control or a crash.

The record

CVE
CVE-2024-22087
Published
Jan 5, 2024
Updated
Jan 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Jan 23, 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?

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
9.8CISA-ADPCVSS: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.

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-787Out-of-bounds Write
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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