Quick answers
- Is CVE-2026-114403 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-114403 being exploited in the wild.
- How severe is CVE-2026-114403?
- High severity, with a CVSS score of 8.1, published 21 October 2026.
- Which products and versions are affected?
- Phpoffice PHPPresentation through 1.2.0.
- Is there a fix for CVE-2026-114403?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-114403 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-114403?
- Check whether you run Phpoffice PHPPresentation 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 insecure deserialization flaw in IOFactory::load() where untrusted presentation file contents are passed to PHP's unserialize() function without validation. An attacker can craft a malicious presentation file (ZIP containing a PhpPresentation.xml) that instantiates arbitrary PHP objects, enabling gadget-chain exploitation for code execution, file manipulation, or denial of service. No authentication or user interaction is required beyond uploading the file.
Affected products
- PHPOffice PHPPresentation through 1.2.0
Timeline
- 2026-10-21: disclosed