# CVE-2023-7326: Epson Stylus SX510W Printer Remote Power Off DoS

> A remote attacker can cause a denial of service on Epson Stylus SX510W printers by sending malformed requests to the embedded web interface.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Nov 2025
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-hrm6-3g2j-qpvx

## What is CVE-2023-7326?

CVE-2023-7326 is a high-severity denial of service vulnerability in Seiko Epson Epson Stylus SX510W, published on 12 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Epson Stylus SX510W embedded web management service fails to properly handle consecutive ampersand characters in query parameters when accessing /PRESENTATION/HTML/TOP/INDEX.HTML. A remote attacker can send a malformed request that triggers improper input parsing or memory handling, resulting in the printer process shutting down or powering off, causing a denial of service condition.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2023-7326?


## How do I fix CVE-2023-7326?

No fix has been published for CVE-2023-7326 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-7326 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-7326 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-7326 and fix it if it is affected.

What it is: CVE-2023-7326 is a high-severity denial of service vulnerability in Seiko Epson Epson Stylus SX510W, published on 12 Nov 2025. 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-2023-7326 exists.

Affected product: Seiko Epson Epson Stylus SX510W. 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-2023-7326/ (Markdown: https://insights.sbomify.com/CVE-2023-7326/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-7326
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-7326
- OSV: https://osv.dev/vulnerability/CVE-2023-7326

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-7326/
Summaries are generated and may contain mistakes; the official description above is the record.