CVE-1999-0881: Falcon web server allows remote attackers to read arbitrary files via a .

Routine

MEDIUM 5.0DOWNGRADE

CVE-1999-0881 is a medium-severity flaw (CVSS 5.0) affecting falcon web server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Falcon web server allows remote attackers to read arbitrary files via a .. (dot dot) attack.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Published	1999-10-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: blueface

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

1999-10-26 04:00 UTCPublished CVE record published
2026-06-16 21:49 UTCUpdated Record last modified

blueface falcon web server DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy falcon-web-server || rpm -q falcon-web-server || falcon-web-server --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison falcon-web-server sudo apt install falcon-web-server=<VERSION_BEFORE_1.0> sudo apt-mark hold falcon-web-server

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

dnf --showduplicates list falcon-web-server sudo dnf downgrade falcon-web-server-<VERSION_BEFORE_1.0> sudo dnf versionlock add falcon-web-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.

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-1999-0881?

falcon web server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-1999-0881 being exploited?

CVE-1999-0881 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-1999-0881 affect?

CVE-1999-0881 affects falcon web server. Severity is medium (CVSS 5.0). Falcon web server allows remote attackers to read arbitrary files via a .. (dot dot) attack.

How urgent is CVE-1999-0881?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2002-2318 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in Falcon web server 2.0.0.1009 through 2.0.0.1021 allows remote atta
CVE-2002-0899 HIGH 7.5 DOWNGRADE Falcon web server 2.0.0.1021 and earlier allows remote attackers to bypass access restrictions for protected f
CVE-2002-0275 MEDIUM 5.0 DOWNGRADE Falcon web server 2.0.0.1020 and earlier allows remote attackers to bypass authentication and read restricted
CVE-1999-0882 MEDIUM 5.0 DOWNGRADE Falcon web server allows remote attackers to determine the absolute path of the web root via long file names.

References

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