CVE-2016-1505: The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to a

Q: How do I fix CVE-2016-1505?

radicale: upgrade to newer than 1.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2016-1505 being exploited?

CVE-2016-1505 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2016-1505 affect?

CVE-2016-1505 affects radicale. Severity is critical (CVSS 10.0). The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to arbitrary files via a crafted path, as demonstrated by /c:/file/ignore.

Q: How urgent is CVE-2016-1505?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 10.0REMOTEUPGRADE

CVE-2016-1505 is a critical-severity flaw (CVSS 10.0) affecting radicale. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to arbitrary files via a crafted path, as demonstrated by /c:/file/ignore.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-21
Published	2016-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: radicale

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-02-03 18:59 UTCPublished CVE record published
2026-06-17 00:42 UTCUpdated Record last modified

radicale radicale UPGRADE

Affected: <= 1.0.1

Fixed in: newer than 1.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade radicale

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade radicale

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2016-1505?

radicale: upgrade to newer than 1.0.1. Exact commands for each OS are on this page.

Is CVE-2016-1505 being exploited?

CVE-2016-1505 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-2016-1505 affect?

CVE-2016-1505 affects radicale. Severity is critical (CVSS 10.0). The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to arbitrary files via a crafted path, as demonstrated by /c:/file/ignore.

How urgent is CVE-2016-1505?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Windows vulnerabilities

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References

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