CVE•Published 2026-08-13•Modified 2026-09-09•1 article on news•6 live references•NVD data
CVE-2026-72840
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
23
Exploit Prediction Scoring System · top 77% of all CVEs
Weaknesses (CWE)
Description
OpenWrt LuCI contains an overly permissive ACL definition in luci-mod-system-mounts that grants write access to /etc/crontabs/root to users intended only for mount configuration. Authenticated users with only the mount-configuration ACL group can append arbitrary cron entries via ubus file.write, which the default busybox crond daemon executes as root within one minute.
Timeline
Published 2026-08-13
Modified 2026-09-09
External references
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-72840Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-72840Censys host search filtered to this CVE id.
grep.app
CVE-2026-72840Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-72840GitHub code search for direct mentions.
Google dork
"CVE-2026-72840" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-72840 on GitHub.