CVE-2004-1854: Buffer overflow in the logging function in Picophone 1.63 and earlier allows remote attackers to execute arbit

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HIGH 7.5DOWNGRADE

CVE-2004-1854 is a high-severity flaw (CVSS 7.5) affecting internet telephone. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in the logging function in Picophone 1.63 and earlier allows remote attackers to execute arbitrary code via a large packet.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	6.9% (top 6%)
CISA exploited list	No
Published	2004-03-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: picophone

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

Am I affected?

Timeline

2004-03-24 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

picophone internet telephone DOWNGRADE

Affected: 1.63

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.63

1. Check installed version

apt-cache policy internet-telephone || rpm -q internet-telephone || internet-telephone --version

2. No fixed release: DOWNGRADE to a release before 1.63 (Debian / Ubuntu)

apt-cache madison internet-telephone sudo apt install internet-telephone=<VERSION_BEFORE_1.63> sudo apt-mark hold internet-telephone

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

dnf --showduplicates list internet-telephone sudo dnf downgrade internet-telephone-<VERSION_BEFORE_1.63> sudo dnf versionlock add internet-telephone

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: PicoPhone Internet Phone 1.63 - Remote Buffer Overflow

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-2004-1854?

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

Is CVE-2004-1854 being exploited?

CVE-2004-1854 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-2004-1854 affect?

CVE-2004-1854 affects internet telephone. Severity is high (CVSS 7.5). Buffer overflow in the logging function in Picophone 1.63 and earlier allows remote attackers to execute arbitrary code via a large packet.

How urgent is CVE-2004-1854?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

References

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