What is CVE-2026-13181?
In Progress® Telerik® UI for AJAX prior to v2026.2.708, forged upload metadata can influence AsyncUploadTypeName processing and trigger unsafe attacker-controlled type resolution, enabling remote code execution in affected deployments.
The record classifies CVE-2026-13181 under weakness class CWE-470. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 75 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.1 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 0.5% probability of exploitation in the next 30 days, higher than 41.1% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 7.7/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-07-22, last modified 2026-07-24
Is CVE-2026-13181 being exploited?
Weaponised exploit code for CVE-2026-13181 is publicly available. 1 public proof-of-concept repository is tracked for this identifier.
Affected products and versions
- Progress Software: Telerik UI for ASP.NET AJAX
How to fix CVE-2026-13181
Vendor advisory: https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-rau-asyncuploadtypename-deserialization-CVE-2026-13181. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2026-13181
1 tracked threat in the Threadlinqs corpus references CVE-2026-13181, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.