CVE-2000-0886: IIS 5.0 allows remote attackers to execute arbitrary commands via a malformed request for an executable file w

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HIGH 7.5WATCHLISTDOWNGRADEDOWNGRADE

CVE-2000-0886 is a high-severity flaw (CVSS 7.5) affecting internet information server, internet information services. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IIS 5.0 allows remote attackers to execute arbitrary commands via a malformed request for an executable file whose name is appended with operating system commands, aka the "Web Server File Request Parsing" vulnerability.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	68.7% (top 1%)
CISA exploited list	No
Published	2000-12-19
Last modified	2026-09-23

Publisher (CNA): MITRE · Vendor: microsoft

Last updated 2026-09-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2000-12-19 05:00 UTCPublished CVE record published
2026-09-23 10:10 UTCUpdated Record last modified

microsoft internet information server DOWNGRADE

Affected: 4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

apt-cache policy internet-information-server || rpm -q internet-information-server || internet-information-server --version

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison internet-information-server sudo apt install internet-information-server=<VERSION_BEFORE_4.0> sudo apt-mark hold internet-information-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list internet-information-server sudo dnf downgrade internet-information-server-<VERSION_BEFORE_4.0> sudo dnf versionlock add internet-information-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

microsoft internet information services DOWNGRADE

Affected: 5.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0

1. Check installed version

apt-cache policy internet-information-services || rpm -q internet-information-services || internet-information-services --version

2. No fixed release: DOWNGRADE to a release before 5.0 (Debian / Ubuntu)

apt-cache madison internet-information-services sudo apt install internet-information-services=<VERSION_BEFORE_5.0> sudo apt-mark hold internet-information-services

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list internet-information-services sudo dnf downgrade internet-information-services-<VERSION_BEFORE_5.0> sudo dnf versionlock add internet-information-services

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Microsoft IIS 4.0/5.0 - Executable File Parsing

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2000-0886?

internet information server: downgrade or apply the listed mitigation; internet information services: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2000-0886 being exploited?

CVE-2000-0886 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2000-0886 affect?

CVE-2000-0886 affects internet information server, internet information services. Severity is high (CVSS 7.5). IIS 5.0 allows remote attackers to execute arbitrary commands via a malformed request for an executable file whose name is appended with operating system commands, aka the "Web Server File Request Parsing" vulnerability.

How urgent is CVE-2000-0886?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist

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References

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