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CVE•Published 2026-09-23•Modified 2026-09-25•0 articles on news•4 live references•NVD data

CVE-2026-88831

Vulnerability data via NVD (ingested)

CVSS v3.1
5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS percentile
9
Exploit Prediction Scoring System · top 91% of all CVEs
Weaknesses (CWE)
CWE-636Not Failing Securely
Description

BusyBox httpd IP deny rules with invalid CIDR prefix lengths fail open, leaving a parsed IP with a zeroed mask so the rule matches no clients.

Timeline
Published 2026-09-23
Modified 2026-09-25

External references

NVDMITREExploit-DBVulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts
vuln:CVE-2026-88831
Hosts Shodan has explicitly fingerprinted as vulnerable.
More intel sources (5)
Shodan report
vuln:CVE-2026-88831
Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-88831
Censys host search filtered to this CVE id.
grep.app
CVE-2026-88831
Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-88831
GitHub code search for direct mentions.
Google dork
"CVE-2026-88831" exploit -site:nvd.nist.gov
Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2026-88831 on GitHub.
We haven't classified any articles referencing CVE-2026-88831 yet. The external references above still apply.