9.9

CVE-2026-72842: openwrt luci External Control of File Name or Path

CVSS: 9.9v3.1CriticalDeferred
Published 13-08-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2026-72842 is a critical (CVSS 9.9) External Control of File Name or Path vulnerability in openwrt luci. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.62%
0%100%
Low · +0.19 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

Description

luci-app-lxc contains an ACL inconsistency vulnerability that allows low-privileged authenticated LuCI users to access backend container management routes without proper authorization checks. Attackers can exploit path traversal via `/.%2E` in the `lxc_name` parameter to escape container directories and control host-side scripts executed through `lxc.hook.start-host`, achieving root code execution on the OpenWrt host.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.19 pp

From 0.42% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.62%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Openwrt1 product
  • luci≤ 24.10.8 | ≥ 25.12.0, ≤ 25.12.5

1 vendor · 1 product

References

2 links