# CVE-2025-14964: TOTOLINK T10 cstecgi.cgi sprintf stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the TOTOLINK T10 router via the loginAuthUrl parameter, potentially leading to code execution or service disruption.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Dec 2025
- **Updated:** 24 Feb 2026
- **Also known as:** GHSA-4jvq-53ch-ccmg

## What is CVE-2025-14964?

CVE-2025-14964 is a critical memory corruption vulnerability in TOTOLINK T10, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in TOTOLINK T10 4.1.8cu.5083_B20200521. This affects the function sprintf of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument loginAuthUrl leads to stack-based buffer overflow. The attack may be performed from remote.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-14964?

It affects 1 product.


Products: Totolink T10 Firmware.

## How do I fix CVE-2025-14964?

No fix has been published for CVE-2025-14964 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-14964 being exploited?

There is no known exploitation of CVE-2025-14964 in the wild and no public exploit code.

## Other vulnerabilities in TOTOLINK T10

- [CVE-2022-25130](https://insights.sbomify.com/CVE-2022-25130/): Command injection in n/a (critical 9.8)
- [CVE-2022-25131](https://insights.sbomify.com/CVE-2022-25131/): Command injection in n/a (critical 9.8)
- [CVE-2022-25132](https://insights.sbomify.com/CVE-2022-25132/): Command injection in n/a (critical 9.8)
- [CVE-2022-25136](https://insights.sbomify.com/CVE-2022-25136/): Command injection in n/a (critical 9.8)
- [CVE-2022-25137](https://insights.sbomify.com/CVE-2022-25137/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-14964 and fix it if it is affected.

What it is: CVE-2025-14964 is a critical memory corruption vulnerability in TOTOLINK T10, published on 19 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-14964 in the wild and no public exploit code.

Affected product: TOTOLINK T10. 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-2025-14964/ (Markdown: https://insights.sbomify.com/CVE-2025-14964/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-14964
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-14964
- OSV: https://osv.dev/vulnerability/CVE-2025-14964

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-14964/
Summaries are generated and may contain mistakes; the official description above is the record.