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CVE-2017-1135 is a vulnerability in the RadAsyncUpload component of Telerik UI for ASP.NET AJAX, where user input is used directly without validation, resulting in an insecure direct object reference. This flaw allows attackers to upload arbitrary files to a restricted location on the server, potentially leading to remote code execution. The vulnerability is related to cryptographic weaknesses and unrestricted file upload issues, and is associated with other vulnerabilities such as CVE-2019-18935 and the Blue Mockingbird campaign.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A previously patched vulnerability in Telerik UI for ASP.NET AJAX, referenced to clarify that its patch does not prevent CVE-2019-18935. Its technical details are not provided.
An older Telerik UI for ASP.NET AJAX vulnerability mentioned in a comparison of patch coverage. Its technical nature is not described. Its patch does not prevent CVE-2019-18935.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.