CVE-2004-1793: Stack-based buffer overflow in swnet.dll in YaSoft Switch Off 2.3 and earlier allows remote authenticated user

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HIGH 7.5DOWNGRADE

CVE-2004-1793 is a high-severity flaw (CVSS 7.5) affecting switch off. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in swnet.dll in YaSoft Switch Off 2.3 and earlier allows remote authenticated users to execute arbitrary code via a long message parameter in a SendMsg action to action.htm.

Why this priority

High severity
EPSS top 7%: 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	5.8% (top 7%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: yatsoft

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

yatsoft switch off DOWNGRADE

Affected: 0.7 · 1.0 · 1.1 · 1.2 · 1.3 · 1.4 · 1.5 · 1.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.7

1. Check installed version

apt-cache policy switch-off || rpm -q switch-off || switch-off --version

2. No fixed release: DOWNGRADE to a release before 0.7 (Debian / Ubuntu)

apt-cache madison switch-off sudo apt install switch-off=<VERSION_BEFORE_0.7> sudo apt-mark hold switch-off

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

dnf --showduplicates list switch-off sudo dnf downgrade switch-off-<VERSION_BEFORE_0.7> sudo dnf versionlock add switch-off

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: YaSoft Switch Off 2.3 - 'swnet.dll' 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-2004-1793?

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

Is CVE-2004-1793 being exploited?

CVE-2004-1793 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-2004-1793 affect?

CVE-2004-1793 affects switch off. Severity is high (CVSS 7.5). Stack-based buffer overflow in swnet.dll in YaSoft Switch Off 2.3 and earlier allows remote authenticated users to execute arbitrary code via a long message parameter in a SendMsg action to action.htm.

How urgent is CVE-2004-1793?

Priority 55/100. High severity; EPSS top 7%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2004-1792 MEDIUM 5.0 DOWNGRADE swnet.dll in YaSoft Switch Off 2.3 and earlier allows remote attackers to cause a denial of service (infinite

References

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