How severe is CVE-2017-11317?

CVE-2017-11317 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-11317 being actively exploited?

Yes. CVE-2017-11317 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-11, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-11317?

CVE-2017-11317 primarily affects Telerik Ui For Asp.net Ajax. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-11317?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2017-11317 have an EU (EUVD) identifier?

Yes. CVE-2017-11317 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-2951. It is also flagged as exploited in the EUVD (since 2022-04-11).

When was CVE-2017-11317 published?

CVE-2017-11317 was published on 2017-08-23 and last updated on 2026-06-17.

CVE-2017-11317

CVE-2017-11317 is a critical-severity vulnerability in Telerik Ui For Asp.net Ajax with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-04-11). The underlying weakness is classified as CWE-326.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 83% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-04-11)
EU (EUVD) id: EUVD-2017-2951
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-04-11)
Weakness: CWE-326
Affected product: Telerik Ui For Asp.net Ajax
Published: 2017-08-23
Last modified: 2026-06-17

Description

Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Frequently asked questions

What is CVE-2017-11317?: Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX before R1 2017 and R2 before R2 2017 SP2 uses weak RadAsyncUpload encryption, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
How severe is CVE-2017-11317?: CVE-2017-11317 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-11317 being actively exploited?: Yes. CVE-2017-11317 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-11, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2017-11317?: CVE-2017-11317 primarily affects Telerik Ui For Asp.net Ajax. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-11317?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2017-11317 have an EU (EUVD) identifier?: Yes. CVE-2017-11317 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-2951. It is also flagged as exploited in the EUVD (since 2022-04-11).
When was CVE-2017-11317 published?: CVE-2017-11317 was published on 2017-08-23 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:telerik:ui_for_asp.net_ajax:*:*:*:*:*:*:*:*
cpe:2.3:a:telerik:ui_for_asp.net_ajax:2017.2.503:*:*:*:*:*:*:*
cpe:2.3:a:telerik:ui_for_asp.net_ajax:2017.2.621:*:*:*:*:*:*:*

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