# CVE-2026-1741: EFM ipTIME A8004T Debug d.cgi httpcon_check_session_url backdoor

> A backdoor in the debug interface of ipTIME A8004T routers allows remote attackers to execute arbitrary commands via the cmd argument.

- **Severity:** High 7.5 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Feb 2026
- **Updated:** 23 Feb 2026
- **Also known as:** GHSA-p6m8-4rxr-8v7p

## What is CVE-2026-1741?

CVE-2026-1741 is a high-severity vulnerability in EFM ipTIME A8004T, published on 2 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was determined in EFM ipTIME A8004T 14.18.2. Affected is the function httpcon_check_session_url of the file /sess-bin/d.cgi of the component Debug Interface. This manipulation of the argument cmd causes backdoor. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-912 (Hidden Functionality)

## Which versions are affected by CVE-2026-1741?

It affects 1 product.


Products: Iptime A8004t Firmware.

## How do I fix CVE-2026-1741?

No fix has been published for CVE-2026-1741 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1741 being exploited?

There is no known exploitation of CVE-2026-1741 in the wild and no public exploit code.

## Other vulnerabilities in EFM ipTIME A8004T

- [CVE-2026-1740](https://insights.sbomify.com/CVE-2026-1740/): EFM ipTIME A8004T Hidden Hiddenloginsetup timepro.cgi httpcon_check_session_url improper authentication (medium 6.9)
- [CVE-2026-1742](https://insights.sbomify.com/CVE-2026-1742/): EFM ipTIME A8004T VPN Service timepro.cgi commit_vpncli_file_upload unrestricted upload (medium 5.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1741 and fix it if it is affected.

What it is: CVE-2026-1741 is a high-severity vulnerability in EFM ipTIME A8004T, published on 2 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-1741 in the wild and no public exploit code.

Affected product: EFM ipTIME A8004T. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-1741/ (Markdown: https://insights.sbomify.com/CVE-2026-1741/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1741
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1741
- OSV: https://osv.dev/vulnerability/CVE-2026-1741

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1741/
Summaries are generated and may contain mistakes; the official description above is the record.