Security readout for executives and security teams
Plain-English summary
A flaw in Telerik UI for ASP.NET AJAX persistence utilities may let an unauthenticated remote attacker turn manipulated saved state into server-side code execution. Exploitation is rated high complexity, but successful attacks could compromise data, applications, and availability.
Executive priority
Prioritize rapid inventory and remediation for externally reachable or business-critical applications. Treat confirmed pre-2026.2.708 deployments using persistence utilities as urgent because successful exploitation could produce complete application-server impact, despite the high-complexity requirement and absence of confirmed active exploitation.
Technical view
CVE-2026-13190 is a CWE-502 deserialization vulnerability involving unsafe type instantiation from attacker-influenced persisted state. The supplied record assigns CVSS 3.1 score 8.1: network-accessible, unauthenticated, user interaction unnecessary, high complexity, with high confidentiality, integrity, and availability impact.
Likely exposure
Applications using Telerik UI for ASP.NET AJAX versions before 2026.2.708 may be exposed when persistence utilities process attacker-influenced state. The bundle’s structured affected-version entry conflicts with its broader description, so organizations should confirm exact applicability against the vendor advisory.
Exploitation context
The supplied sources do not establish active exploitation, and the CVE is not listed as KEV in the bundle. Exploitation requires high complexity but needs neither authentication nor user interaction according to the CVSS vector. No exploit method should be inferred from this evidence.
Researcher notes
The core condition is unsafe type resolution during deserialization of attacker-influenced persisted state. Evidence supports potential remote code execution but provides no validated exploitation details. The bundle lists version 2011.2.712 while describing all releases before 2026.2.708 as affected; this discrepancy warrants direct vendor confirmation.
Mitigation direction
- Upgrade Telerik UI for ASP.NET AJAX to version 2026.2.708 or later.
- Review the vendor advisory for configuration-specific requirements and additional mitigations.
- Restrict exposure of affected applications until remediation is verified.
- Preserve relevant application and security logs for investigation.
Validation and detection
- Inventory deployed Telerik UI for ASP.NET AJAX versions.
- Confirm whether applications use the affected persistence utilities.
- Verify installed components report version 2026.2.708 or later.
- Review logs for unexpected persistence-state processing or anomalous server behavior.
- Recheck applicability against the vendor advisory because the supplied version fields conflict.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-13190 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9ProgressSoftwareVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/kb-security-persistence-framework-unsafe-type-resolution-CVE-2026-13190CVE reference, ProgressSoftware · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.