# CVE-2026-78167: EFM ipTIME T16000M Session Validation httpcon_check_session_url improper authentication

> Remote attackers can bypass authentication in the session validation handler of EFM ipTIME T16000M routers, potentially gaining unauthorized access.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-2hpc-g37m-pmw5

## What is CVE-2026-78167?

CVE-2026-78167 is a critical authentication bypass vulnerability in EFM ipTIME T16000M, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A weakness has been identified in EFM ipTIME T16000M 14.20.2. The impacted element is the function httpcon_check_session_url of the component Session Validation Handler. This manipulation causes improper authentication. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-78167?


## How do I fix CVE-2026-78167?

No fix has been published for CVE-2026-78167 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-78167 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78167 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-78167 and fix it if it is affected.

What it is: CVE-2026-78167 is a critical authentication bypass vulnerability in EFM ipTIME T16000M, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-78167 exists.

Affected product: EFM ipTIME T16000M. 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-2026-78167/ (Markdown: https://insights.sbomify.com/CVE-2026-78167/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-78167
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-78167
- OSV: https://osv.dev/vulnerability/CVE-2026-78167

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-78167/
Summaries are generated and may contain mistakes; the official description above is the record.