# CVE-2018-25217: PDF Explorer 1.5.66.2 Structured Exception Handler Local Code Execution

> Local attackers can execute arbitrary code via a structured exception handler overflow in the Label field of the Custom fields settings dialog.

- **Severity:** High 8.6 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Mar 2026
- **Updated:** 26 Mar 2026
- **Also known as:** GHSA-7v3h-hrvp-35cg

## What is CVE-2018-25217?

CVE-2018-25217 is a high-severity memory corruption vulnerability in Rttsoftware PDF Explorer, published on 26 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

PDF Explorer 1.5.66.2 contains a structured exception handler (SEH) overflow vulnerability that allows local attackers to execute arbitrary code by overwriting SEH records with malicious data. Attackers can craft a payload with buffer overflow, NSEH jump, and ROP gadget chains that execute when the Custom fields settings dialog processes the malicious input in the Label field.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2018-25217?

It affects 1 product.


Products: Rttsoftware Pdf Explorer.

## How do I fix CVE-2018-25217?

No fix has been published for CVE-2018-25217 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-25217 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25217 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-25217 and fix it if it is affected.

What it is: CVE-2018-25217 is a high-severity memory corruption vulnerability in Rttsoftware PDF Explorer, published on 26 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-25217 exists.

Affected product: Rttsoftware PDF Explorer. 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-2018-25217/ (Markdown: https://insights.sbomify.com/CVE-2018-25217/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-25217
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-25217
- OSV: https://osv.dev/vulnerability/CVE-2018-25217

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-25217/
Summaries are generated and may contain mistakes; the official description above is the record.