---
title: "CVE-2026-55159: luci-app-adblock-fast - Command Injection"
description: "luci-app-adblock-fast < 1.2.4-2 contains a command injection caused by improper handling of carriage-return or line-feed characters in the setCronEntry RPC method, letting authenticated delegated users with write ACL execute persistent commands as root, exploit requires write ACL."
url: https://panop.io/threat-heartbeat/CVE-2026-55159/
---

# CVE-2026-55159 luci-app-adblock-fast - Command Injection

luci-app-adblock-fast < 1.2.4-2 contains a command injection caused by improper handling of carriage-return or line-feed characters in the setCronEntry RPC method, letting authenticated delegated users with write ACL execute persistent commands as root, exploit requires write ACL.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.49% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-55159)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-93](https://cwe.mitre.org/data/definitions/93.html)

## Vendor fix

Update to version 1.2.4-2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-55159](https://nvd.nist.gov/vuln/detail/CVE-2026-55159)
- [https://github.com/openwrt/luci/commit/9ccd99b5898457e5ef39dc21aea226d7fb6e5c7e](https://github.com/openwrt/luci/commit/9ccd99b5898457e5ef39dc21aea226d7fb6e5c7e)
- [https://github.com/openwrt/luci/commit/f67461fd0255bf992b2b559c22ec288067f2f9da](https://github.com/openwrt/luci/commit/f67461fd0255bf992b2b559c22ec288067f2f9da)
- [https://github.com/openwrt/luci/pull/8705](https://github.com/openwrt/luci/pull/8705)
- [https://github.com/openwrt/luci/security/advisories/GHSA-ggpf-xrph-wg5v](https://github.com/openwrt/luci/security/advisories/GHSA-ggpf-xrph-wg5v)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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