CVE-2024-22087

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-01-05. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

route in main.c in Pico HTTP Server in C through f3b69a6 has an sprintf stack-based buffer overflow via a long URI, leading to remote code execution.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
1.6%
EPSS %ILE
75th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 5, 2024

Last Modified

June 17, 2026

Advisory Details (3)

Auto-updated Oct 4, 2026
🔬 Proof of concept available. Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic🟡 PoC Available

Remote buffer overflow in main.c · Issue #31 · foxweb/pico · GitHub

https://github.com/foxweb/pico/issues/31
github_commit

commit e2d172f (foxweb/pico)

Fix landed in foxweb/pico commit e2d172f — awaiting tagged release

https://github.com/foxweb/pico/commit/e2d172f
github_commit

commit 7a5e4e242121 (foxweb/pico)

Fix landed in foxweb/pico commit 7a5e4e242121 — awaiting tagged release

https://github.com/foxweb/pico/commit/7a5e4e242121c839cb77f5b9003e735a852f4e58

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 170 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
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  47. 2026-07-23 02:33 UTCEG score recompute
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  49. 2026-07-22 14:07 UTCEPSS rescore
  50. 2026-07-21 15:23 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-22087?
CVE-2024-22087 is a critical vulnerability published on January 5, 2024. route in main.c in Pico HTTP Server in C through f3b69a6 has an sprintf stack-based buffer overflow via a long URI, leading to remote code execution.
When was CVE-2024-22087 disclosed?
CVE-2024-22087 was first published on January 5, 2024, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-22087 actively exploited?
CVE-2024-22087 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% probability of exploitation in the next 30 days (75th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-22087?
CVE-2024-22087 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-22087?
An upstream fix for CVE-2024-22087 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix.

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