Ziroom ZHOME A0101 Lua zrUsb.lua loadstring code injection
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- Proof of concept public, per CISA
- Fix
- No fix listed
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Affects Ziroom ZHOME-A0101 firmware 1.0.1.0, Build 202004151405. Attacker must be able to control the content of /tmp/run/usb_list_result or /tmp/run/old_usb_list_result. The affected API requires authenticated root access.
- Exploitation15/40CISA rates a proof of concept as public
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity10/10CVSS 9.4, total technical impact per CISA
- No patch5/5No patch listed yet
What would change the score
- Would score about 73 if added to CISA KEV
- Would score about 68 if CISA's SSVC rates exploitation active
- Would score about 45 if CISA's SSVC rates it automatable
CVE-2026-121260 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.4 (critical) and affects ZHOME A0101; no fixed version is listed yet.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 38/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: poc
- Automatable: no
- Technical impact: total
Summary
The Ziroom ZHOME A0101 smart home device's Lua handler component, specifically its zrUsb.lua controller, contains a flaw that allows an attacker to inject and run arbitrary code remotely. Successful exploitation could give an attacker control over the affected device.
Read the original description
A flaw has been found in Ziroom ZHOME A0101 1.0.1.0 Build 202004151405. This issue affects the function loadstring of the file usr/lib/lua/luci/controller/api/zrUsb.lua of the component Lua Handler. This manipulation causes code injection. Remote exploitation of the attack is possible. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
What to do
Check whether your setup matches what the bug needs.
Affects Ziroom ZHOME-A0101 firmware 1.0.1.0, Build 202004151405. Attacker must be able to control the content of /tmp/run/usb_list_result or /tmp/run/old_usb_list_result. The affected API requires authenticated root access.Workaround: The checked facts give no workaround or fix. Until one is available, limiting access to the device's web management interface and the root-level API it exposes reduces the exposure, since the attack depends on authenticated root access and control of the USB result files.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Ziroom ZHOME A0101
1.0.1.0 Build 202004151405
Evidence 5
- Advisory
- Advisory
- Advisory
- Advisory
- Exploit
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121260
Is CVE-2026-121260 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. CISA's SSVC assessment notes a proof of concept exists. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
The zrUsb.lua script passes content from USB result files to Lua's loadstring function, so text in those files can be run as Lua code. If an attacker can write to those files, the endpoint can execute arbitrary Lua code, which can call os.execute() and run system commands in the web management context.Source: github.com
Which versions are affected by CVE-2026-121260?
ZHOME A0101: version 1.0.1.0 Build 202004151405.Source: cve.now feed data
Am I affected, and how do I check?
The facts list Ziroom ZHOME-A0101 firmware 1.0.1.0, Build 202004151405 (shown as 'Firmware Version: 1.0.1.0, Build 202004151405'). The attack needs write control over /tmp/run/usb_list_result or /tmp/run/old_usb_list_result, and the affected API requires authenticated root access. To check a device's firmware version, look at the firmware version shown in the device's web management interface.Source: github.com
How do I fix CVE-2026-121260?
No fixed version is listed in the checked facts, so no upgrade target can be confirmed from them. Check the vendor's site for a firmware update that addresses this issue.Source: github.com
What if there's no patch?
The checked facts give no workaround or fix. Until one is available, limiting access to the device's web management interface and the root-level API it exposes reduces the exposure, since the attack depends on authenticated root access and control of the USB result files.Source: github.com