CVE-2001-0837: DeltaThree Pc-To-Phone 3.0.3 places sensitive data in world-readable locations in the installation directory,

Routine

LOW 2.1DOWNGRADE

CVE-2001-0837 is a low-severity flaw (CVSS 2.1) affecting pc-to-phone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DeltaThree Pc-To-Phone 3.0.3 places sensitive data in world-readable locations in the installation directory, which allows local users to read the information in (1) temp.html, (2) the log folder, and (3) the PhoneBook folder.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Published	2001-12-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: deltathree

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

Am I affected?

Timeline

2001-12-06 05:00 UTCPublished CVE record published
2026-06-16 21:55 UTCUpdated Record last modified

deltathree pc-to-phone DOWNGRADE

Affected: 3.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.3

1. Check installed version

apt-cache policy pc-to-phone || rpm -q pc-to-phone || pc-to-phone --version

2. No fixed release: DOWNGRADE to a release before 3.0.3 (Debian / Ubuntu)

apt-cache madison pc-to-phone sudo apt install pc-to-phone=<VERSION_BEFORE_3.0.3> sudo apt-mark hold pc-to-phone

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

dnf --showduplicates list pc-to-phone sudo dnf downgrade pc-to-phone-<VERSION_BEFORE_3.0.3> sudo dnf versionlock add pc-to-phone

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-2001-0837?

pc-to-phone: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-0837 being exploited?

CVE-2001-0837 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-2001-0837 affect?

CVE-2001-0837 affects pc-to-phone. Severity is low (CVSS 2.1). DeltaThree Pc-To-Phone 3.0.3 places sensitive data in world-readable locations in the installation directory, which allows local users to read the information in (1) temp.html, (2) the log folder, and (3) the PhoneBook folder.

How urgent is CVE-2001-0837?

Priority 14/100. No elevated risk signals yet.

References

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