Preliminary research

From Arbitrary File Read to Shell: Yet Another RCE in Telerik

Marcio Almeida · Tanto Security · 27 October 2026

AI-collected research leads through 3 November 2026, including a November–October–September missed-article review and a targeted multilingual search alongside earlier community-source sweeps. Unranked, incomplete, not community-vetted, and subject to change.

Traces unsigned ImageEditor state and a replayable editor dialog into server-minted download tokens for application-root files. Explains relative-path resolution and chains leaked configuration keys into forged upload paths or ViewState execution, with reachable-control, key and filesystem prerequisites. Distinct from the earlier padding oracle.

Record

Researcher

Marcio Almeida

Published by

Tanto Security

Date

27 October 2026

In the archive

• Collected in the 2026 preliminary research sweep

Related sources

• Earlier research
• Vendor bulletin
• Research code and usage

Tags

• file-read
• path-traversal
• viewstate
• deserialization
• owasp-a01-2021
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Marcio Almeida, first published at the original source. Preserved copies are kept so the citation survives its host.