Page generated: 08 Nov 2026, 12:27 UTC
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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.

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.9/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 84.17%: +0.42

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

TechTarget
Press · 16 Mar 2023, 07:00 · U.S. federal agency hacked via 3-year-old Telerik UI flaw - TechTarget
The Hacker News
Press · 16 Mar 2023, 07:00 · Multiple Hacker Groups Exploit 3-Year-Old Vulnerability to Breach U.S. Federal Agency - The Hacker News
Industrial Cyber
Press · 16 Mar 2023, 07:00 · US agencies warn of hackers exploiting Progress Telerik vulnerability in government IIS web server - Industrial Cyber
TechTarget
Press · 16 Mar 2023, 07:00 · U.S. federal agency hacked via 3-year-old Telerik UI flaw - TechTarget
The Record from Recorded Future News
Press · 14 Mar 2023, 07:00 · CISA: US agency breached by cybercriminals, gov’t hackers - The Record from Recorded Future News
See all 10 source documents
Sophos
Press · 15 Jun 2022, 07:00 · Telerik UI exploitation leads to cryptominer, Cobalt Strike infections - Sophos
BleepingComputer
Press · 15 Jun 2022, 07:00 · Hackers exploit three-year-old Telerik flaws to deploy Cobalt Strike - BleepingComputer
The Hacker News
Press · 02 Aug 2021, 07:00 · New APT Hacking Group Targets Microsoft IIS Servers with ASP.NET Exploits - The Hacker News
The Record from Recorded Future News
Press · 26 Jul 2021, 07:00 · Praying Mantis APT targets IIS servers with ASP.NET exploits - The Record from Recorded Future News
Help Net Security
Press · 23 Apr 2020, 07:00 · Web shell malware continues to evade many security tools - Help Net Security

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.9 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

Source entries and unverified repository candidates are counted separately.

Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 84.2%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:48.666564+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
23 Aug 2017, 17:00
First press mention
23 Apr 2020, 07:00
Added to the CISA KEV catalog
11 Apr 2022, 00:00
Latest press mention
16 Mar 2023, 07:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
1 repositories