CVE-2026-13187

Q: How do I fix CVE-2026-13187?

Upgrade telerik ui for asp.net ajax to 2026.2.708 or later.

Q: Is CVE-2026-13187 being actively exploited?

Not that we know of. CVE-2026-13187 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 27% of all scored CVEs.

Q: How severe is CVE-2026-13187?

CVE-2026-13187 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-13187 affect?

Published advisories record a fix for telerik ui for asp.net ajax (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

8.1

CVSS v3

NVD

Description

In Progress® Telerik® UI for AJAX prior to v2026.2.708, DialogHandler provider type input may be tampered with, potentially altering dialog processing and enabling chained exploitation.

CWE-470

How to fix

Remediation Available

telerik ui for asp.net ajaxNVD

Affected:>= 2011.2712, < 2026.2.708Fixed in:2026.2.708CVE-2026-13187derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.34%probability of exploitation in 30 days

27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Vendor Advisory1

telerik.com

Related Vulnerabilities

Other CWE-470 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2024-4990	Critical	9.1	80%	-	-
CVE-2024-0200	High	7.2	72%	-	Fix
CVE-2022-30287	High	8.0	70%	-	Fix
CVE-2025-3600	High	7.5	20%	-	-
CVE-2018-5511	High	7.2	15%	-	-

Common questions

How do I fix CVE-2026-13187?

Upgrade telerik ui for asp.net ajax to 2026.2.708 or later.

Is CVE-2026-13187 being actively exploited?

Not that we know of. CVE-2026-13187 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.34% is the estimated probability that it will be exploited in the next 30 days. That is higher than 27% of all scored CVEs.

How severe is CVE-2026-13187?

CVE-2026-13187 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-13187 affect?

Published advisories record a fix for telerik ui for asp.net ajax (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-13187

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-08-06.