What is the CVSS score of CVE-2026-2878?

CVE-2026-2878 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.0%.

Which versions of Telerik Ui For Asp.Net Ajax are affected by CVE-2026-2878?

CVE-2026-2878 presents moderate security risk rated CVSS 5.3. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-2878?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Telerik Ui For Asp.Net Ajax CVE-2026-2878

MEDIUM

Insufficient Entropy (CWE-331)

2026-02-25 security@progress.com

Information Disclosure Telerik Ui For Asp.Net Ajax

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 25, 2026 - 15:20 nvd

MEDIUM 5.3

DescriptionCVE.org

In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.

AnalysisAI

Telerik Ui For Asp.Net Ajax versions up to 2026.1.225 contains a vulnerability that allows attackers to collisions and file content tampering (CVSS 5.3).

Technical ContextAI

affects Telerik Ui For Asp.Net Ajax. In Progress® Telerik® UI for AJAX, versions prior to 2026.1.225, an insufficient entropy vulnerability exists in RadAsyncUpload, where a predictable temporary identifier, based on timestamp and filename, can enable collisions and file content tampering.