CVE-2003-1276: Netfone.exe of NetTelephone 3.5.6 uses weak encryption for user PIN's and stores user account numbers in plain

Routine

MEDIUM 4.6DOWNGRADE

CVE-2003-1276 is a medium-severity flaw (CVSS 4.6) affecting nettelephone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Netfone.exe of NetTelephone 3.5.6 uses weak encryption for user PIN's and stores user account numbers in plaintext in the HKEY_CURRENT_USER\Software\MediaRing.com\SDK\NetTelephone\settings registry key, which could allow local users to gain unauthorized access to NetTelephone accounts.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Published	2003-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nettelephone

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

Am I affected?

Timeline

2003-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:03 UTCUpdated Record last modified

nettelephone nettelephone DOWNGRADE

Affected: 3.5.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.5.6 (Debian / Ubuntu)

apt-cache madison nettelephone sudo apt install nettelephone=<VERSION_BEFORE_3.5.6> sudo apt-mark hold nettelephone

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

dnf --showduplicates list nettelephone sudo dnf downgrade nettelephone-<VERSION_BEFORE_3.5.6> sudo dnf versionlock add nettelephone

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-2003-1276?

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

Is CVE-2003-1276 being exploited?

CVE-2003-1276 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-2003-1276 affect?

CVE-2003-1276 affects nettelephone. Severity is medium (CVSS 4.6). Netfone.exe of NetTelephone 3.5.6 uses weak encryption for user PIN's and stores user account numbers in plaintext in the HKEY_CURRENT_USER\Software\MediaRing.com\SDK\NetTelephone\settings registry key, which could allow local users to gain

How urgent is CVE-2003-1276?

Priority 19/100. No elevated risk signals yet.

References

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