CVE-2004-1868: Stack-based buffer overflow in WinSig.exe in eSignal 7.5 and 7.6 allows remote attackers to execute arbitrary

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HIGH 7.5DOWNGRADE

CVE-2004-1868 is a high-severity flaw (CVSS 7.5) affecting esignal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in WinSig.exe in eSignal 7.5 and 7.6 allows remote attackers to execute arbitrary code via a long STREAMQUOTE tag.

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	6.7% (top 6%)
CISA exploited list	No
Published	2004-03-25
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: esignal

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

Am I affected?

Timeline

2004-03-25 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

esignal esignal DOWNGRADE

Affected: 7.5 · 7.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.5

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 7.5 (Debian / Ubuntu)

apt-cache madison esignal sudo apt install esignal=<VERSION_BEFORE_7.5> sudo apt-mark hold esignal

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

dnf --showduplicates list esignal sudo dnf downgrade esignal-<VERSION_BEFORE_7.5> sudo dnf versionlock add esignal

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: eSignal 7.6 - STREAMQUOTE 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-2004-1868?

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

Is CVE-2004-1868 being exploited?

CVE-2004-1868 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-2004-1868 affect?

CVE-2004-1868 affects esignal. Severity is high (CVSS 7.5). Stack-based buffer overflow in WinSig.exe in eSignal 7.5 and 7.6 allows remote attackers to execute arbitrary code via a long STREAMQUOTE tag.

How urgent is CVE-2004-1868?

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

Related CVEs

CVE-2011-3503 HIGH 9.3 DOWNGRADE Untrusted search path vulnerability in eSignal 10.6.2425.1208, and possibly other versions, allows local users
CVE-2011-3494 HIGH 10.0 UPGRADE WinSig.exe in eSignal 10.6.2425 and earlier allows remote attackers to cause a denial of service (crash) and p

References

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