Microsoft Internet Information Services (IIS) 5.0 contains a local privilege escalation vulnerability caused by the use of relative paths when locating certain system files that are executed in-process. Because the service does not securely resolve the intended trusted module path, a local attacker can place a Trojanized file in a location that is searched first and cause IIS to load the attacker-controlled file instead of the legitimate system component. This is a classic search path / uncontrolled search path issue that enables DLL side-loading or similar Trojan horse replacement behavior within the IIS process context. Successful exploitation results in execution of attacker-supplied code with elevated privileges associated with the IIS service.
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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 valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An old IIS server vulnerability referenced in the context of DLL side-loading activity by FIN13.
An old IIS-related vulnerability referenced in the context of DLL side-loading on legacy IIS servers to load a malicious httpodbc.dll.
A vulnerability affecting older Microsoft IIS servers that can be leveraged via DLL side-loading (IISCrack.dll) to load a malicious httpodbc.dll.
A legacy Microsoft IIS vulnerability (CVE-2001-0507) referenced as being abused in conjunction with DLL side-loading (IISCrack.dll) to load a malicious httpodbc.dll on older IIS servers.
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.