CVE-2007-6405: Sergey Lyubka Simple HTTPD (shttpd) 1.38 and earlier on Windows allows remote attackers to download arbitrary

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MEDIUM 6.4DOWNGRADE

CVE-2007-6405 is a medium-severity flaw (CVSS 6.4) affecting shttpd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sergey Lyubka Simple HTTPD (shttpd) 1.38 and earlier on Windows allows remote attackers to download arbitrary CGI programs or scripts via a URI with an appended (1) '+' character, (2) '.' character, (3) %2e sequence (hex-encoded dot), or (4) hex-encoded character greater than 0x7f. NOTE: the %20 vector is already covered by CVE-2007-3407.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-200
Published	2007-12-17
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: shttpd

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

Am I affected?

Timeline

2007-12-17 18:46 UTCPublished CVE record published
2026-06-16 22:48 UTCUpdated Record last modified

shttpd shttpd DOWNGRADE

Affected: 1.34 · 1.35 · 1.38

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.34

1. Check installed version

apt-cache policy shttpd || rpm -q shttpd || shttpd --version

2. No fixed release: DOWNGRADE to a release before 1.34 (Debian / Ubuntu)

apt-cache madison shttpd sudo apt install shttpd=<VERSION_BEFORE_1.34> sudo apt-mark hold shttpd

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

dnf --showduplicates list shttpd sudo dnf downgrade shttpd-<VERSION_BEFORE_1.34> sudo dnf versionlock add shttpd

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: Simple HTTPd 1.38 - Multiple Vulnerabilities

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-2007-6405?

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

Is CVE-2007-6405 being exploited?

CVE-2007-6405 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-2007-6405 affect?

CVE-2007-6405 affects shttpd. Severity is medium (CVSS 6.4). Sergey Lyubka Simple HTTPD (shttpd) 1.38 and earlier on Windows allows remote attackers to download arbitrary CGI programs or scripts via a URI with an appended (1) '+' character, (2) '.' character, (3) %2e sequence (hex-encoded dot), or (4

How urgent is CVE-2007-6405?

Priority 49/100. Public exploit reference

Software pages

Apache HTTP Server vulnerabilities · Windows vulnerabilities

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References

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