# CVE-2026-18293: OriginLab Origin Viewer out-of-bounds write in OPJ parsing

Source: https://junglewise.ai/threats/cve-2026-18293-originlab-origin-viewer-out-of-bounds-write-in-opj-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18293 · Severity: high · CVSS 7.8 · Published 2026-08-20

OriginLab Origin Viewer is a document viewer used to open project files. An out-of-bounds write vulnerability in the parsing of OPJ project files could allow an attacker to execute arbitrary code if a user opens a specially crafted malicious file. Successful exploitation would grant the attacker full control over the affected system with the user's privileges.

Technologies: [OriginLab Origin Viewer](https://junglewise.ai/threats/technologies/origin-viewer). Vendors: [OriginLab](https://junglewise.ai/threats/vendors/originlab).

## Quick answers

**Is CVE-2026-18293 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18293 being exploited in the wild.

**How severe is CVE-2026-18293?** High severity, with a CVSS score of 7.8, published 20 August 2026.

**Which products and versions are affected?** OriginLab Origin Viewer 9.9.5 and earlier.

**Is there a fix for CVE-2026-18293?** A patch was published on 2026-08-20: Fix available in Origin Viewer 10.4.0.25 or later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-18293 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-18293?** Check whether you run OriginLab Origin Viewer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an out-of-bounds write flaw in OriginLab Origin Viewer's OPJ file parser. The root cause is insufficient validation of user-supplied data during the parsing of OPJ project files, allowing an attacker to write past the end of an allocated data structure. The attack requires user interaction: a target must open a malicious OPJ file, typically via direct file opening or a deceptive link. An attacker can leverage this memory corruption to achieve arbitrary code execution in the context of the current process. OriginLab has patched this vulnerability; users should update to Origin Viewer 10.4.0.25 or later.

## Affected products

- OriginLab Origin Viewer 9.9.5 and earlier

## Timeline

- 2026-03-31: disclosed: Vulnerability reported to vendor
- 2026-08-11: advisory: Coordinated public release of advisory (ZDI-26-552)
- 2026-08-20: patched: Fix available in Origin Viewer 10.4.0.25 or later

## References

- [https://docs.originlab.com/cve/CVE-2026-18293](https://docs.originlab.com/cve/CVE-2026-18293)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-552/](https://www.zerodayinitiative.com/advisories/ZDI-26-552/)

## Related threats

- [OriginLab Origin Viewer OGWU file parsing heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-114569-originlab-origin-viewer-ogwu-file-parsing-heap-based-buffer)
- [OriginLab Origin Viewer heap buffer overflow in OPJ parsing](https://junglewise.ai/threats/cve-2026-114568-originlab-origin-viewer-opj-file-parsing-heap-based-buffer)
- [OriginLab Origin Viewer out-of-bounds write in OGWU file parsing](https://junglewise.ai/threats/cve-2026-114567-originlab-origin-viewer-ogwu-file-parsing-out-of-bounds-write)
- [OriginLab Origin Viewer memory corruption in OGM file parsing](https://junglewise.ai/threats/cve-2026-114566-originlab-origin-viewer-ogm-file-parsing-memory-corruption)
- [OriginLab Origin Viewer out-of-bounds write in OGG parsing](https://junglewise.ai/threats/cve-2026-114565-originlab-origin-viewer-ogg-file-parsing-out-of-bounds-write)