# Microsoft Internet Information Services vulnerabilities

Source: https://junglewise.ai/threats/technologies/internet-information-services  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 11 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/internet-information-services.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 6 vulnerabilities in Microsoft Internet Information Services: 1 in the last 7 days and 1 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-119909, was published on 10 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 1
- All time: 6 (1 critical, 0 exploited in the wild)

## About Microsoft Internet Information Services

Web server software for hosting websites and applications on Windows servers.

## Latest Microsoft Internet Information Services vulnerabilities

- [CVE-2026-119909: Windows Internet Information Services denial of service](https://junglewise.ai/threats/cve-2026-119909-uncontrolled-resource-consumption-in-windows-internet) (medium, CVSS 5.9, published 10 Nov 2026)
- [CVE-1999-0012: Microsoft Windows Web Servers access bypass via long filenames](https://junglewise.ai/threats/cve-1999-0012-microsoft-windows-web-servers-access-bypass-via-long-filenames) (high, CVSS 7, published 6 Feb 1998)
- [CVE-1999-0191: Microsoft IIS file overwrite in newdsn.exe CGI script](https://junglewise.ai/threats/cve-1999-0191-microsoft-iis-file-overwrite-in-newdsn-exe-cgi-script) (medium, CVSS 6.4, published 1 Sep 1997)
- [CVE-1999-0281: Microsoft IIS denial of service via long URLs](https://junglewise.ai/threats/cve-1999-0281-microsoft-iis-denial-of-service-via-long-urls) (medium, CVSS 5, published 1 Jun 1997)
- [CVE-1999-0253: Microsoft IIS source code disclosure via URL encoding](https://junglewise.ai/threats/cve-1999-0253-microsoft-iis-source-code-disclosure-via-url-encoding) (high, CVSS 7.5, published 1 Jan 1997)
- [CVE-1999-0233: Microsoft IIS arbitrary command execution via .bat and .cmd files](https://junglewise.ai/threats/cve-1999-0233-microsoft-iis-arbitrary-command-execution-via-bat-and-cmd-files) (critical, CVSS 10, published 25 Feb 1996)

## Most severe Microsoft Internet Information Services vulnerabilities

- [CVE-1999-0233: Microsoft IIS arbitrary command execution via .bat and .cmd files](https://junglewise.ai/threats/cve-1999-0233-microsoft-iis-arbitrary-command-execution-via-bat-and-cmd-files) (critical, CVSS 10, published 25 Feb 1996)
- [CVE-1999-0253: Microsoft IIS source code disclosure via URL encoding](https://junglewise.ai/threats/cve-1999-0253-microsoft-iis-source-code-disclosure-via-url-encoding) (high, CVSS 7.5, published 1 Jan 1997)
- [CVE-1999-0012: Microsoft Windows Web Servers access bypass via long filenames](https://junglewise.ai/threats/cve-1999-0012-microsoft-windows-web-servers-access-bypass-via-long-filenames) (high, CVSS 7, published 6 Feb 1998)
- [CVE-1999-0191: Microsoft IIS file overwrite in newdsn.exe CGI script](https://junglewise.ai/threats/cve-1999-0191-microsoft-iis-file-overwrite-in-newdsn-exe-cgi-script) (medium, CVSS 6.4, published 1 Sep 1997)
- [CVE-2026-119909: Windows Internet Information Services denial of service](https://junglewise.ai/threats/cve-2026-119909-uncontrolled-resource-consumption-in-windows-internet) (medium, CVSS 5.9, published 10 Nov 2026)
- [CVE-1999-0281: Microsoft IIS denial of service via long URLs](https://junglewise.ai/threats/cve-1999-0281-microsoft-iis-denial-of-service-via-long-urls) (medium, CVSS 5, published 1 Jun 1997)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 1 | 0 | 0 |

## Other Microsoft technologies

- [Microsoft Windows](https://junglewise.ai/threats/technologies/windows): 2,362 vulnerabilities
- [Microsoft Windows 10](https://junglewise.ai/threats/technologies/windows-10): 589 vulnerabilities
- [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2): 565 vulnerabilities
- [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2): 534 vulnerabilities
- [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025): 534 vulnerabilities
- [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022): 528 vulnerabilities
- [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019): 521 vulnerabilities
- [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012): 517 vulnerabilities
- [Microsoft Windows 11](https://junglewise.ai/threats/technologies/windows-11): 494 vulnerabilities
- [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016): 476 vulnerabilities
- [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809): 380 vulnerabilities
- [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2): 373 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Microsoft Internet Information Services vulnerabilities", https://junglewise.ai/threats/technologies/internet-information-services, 11 November 2026.