Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 on Windows XP SP3, when directory-based Basic Authentication
Unspecified vulnerability in Microsoft Internet Information Services (IIS) 5.1 on Windows XP SP3, when directory-based Basic Authentication is enabled, allows remote attackers to bypass intended access restrictions and execute ASP files via a crafted request, aka "Directory Authentication Bypass Vulnerability."
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Sep 15, 2010
- Updated
- Jun 16, 2026
- EPSS
- 31.1% · 98th percentile
- CWE
- CWE-287
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 9 / 30 · 31.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows xp | cpe:2.3:o:microsoft:windows_xp |
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-0119Buffer overflow in Microsoft Windows XP SP3 allows remote attackers to cause a denial of service (memory corruption and application crash) o51Plan
- CVE-2012-1853Stack-based buffer overflow in the Remote Administration Protocol (RAP) implementation in the LanmanWorkstation service in Microsoft Windows49Plan
- CVE-2012-1852Heap-based buffer overflow in the Remote Administration Protocol (RAP) implementation in the LanmanWorkstation service in Microsoft Windows 49Plan
- CVE-2007-1946Integer overflow in Windows Explorer in Microsoft Windows XP SP1 might allow user-assisted remote attackers to cause a denial of service (cr48Plan
- CVE-2004-2289Microsoft Windows XP Explorer allows local users to execute arbitrary code via a system folder with a Desktop.ini file containing a .ShellCl47Plan
- CVE-2011-1243The Windows Messenger ActiveX control in msgsc.dll in Microsoft Windows XP SP2 and SP3 allows remote attackers to execute arbitrary code via46Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2010-07-02 |
| Metasploit module | auxiliary/admin/http/iis_auth_bypassMS10-065 Microsoft IIS 5 NTFS Stream Authentication Bypassauxiliary | 2010-07-02 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- First PoC-76 d
- Metasploit-76 d
- Published
- TodaySep 30, 2026+5859 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
If successful
- Confidentiality
- P · data can be read
- Integrity
- P · data or configuration can be modified
- Availability
- P · the service can be disrupted
- Attack complexity
- M
- Confidentiality impact
- P
- Integrity impact
- P
- Availability impact
- P
Weakness class (CWE)
CWE-287 · Improper AuthenticationCVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
nvd-primary
Root cause
Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.
The bug in code
The whole CWE-287 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
app.use("/admin", requireSession, adminRouter);
// Route added later skips the middlewareapp.post("/admin-api/config", updateConfig);Fixed
const admin = express.Router();admin.use(requireSession, requireRole("admin"));
admin.post("/config", updateConfig);app.use("/admin", admin);Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Authentication AbuseCAPEC-114Medium
- Authentication BypassCAPEC-115Medium
- Identity SpoofingCAPEC-151likelihood: Medium · Medium
- Fake the Source of DataCAPEC-194Medium
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- Utilizing REST's Trust in the System Resource to Obtain Sensitive DataCAPEC-57likelihood: Medium · Very High
- Session HijackingCAPEC-593likelihood: High · Very High
- Token ImpersonationCAPEC-633Medium
ATT&CK techniques
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-065
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6942
Vendor advisories and official records. Exploit/PoC links are deliberately left out.