CVE-2008-4193: Stack-based buffer overflow in SecurityGateway.dll in Alt-N Technologies SecurityGateway 1.0.1 allows remote a

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HIGH 10.0DOWNGRADE

CVE-2008-4193 is a high-severity flaw (CVSS 10.0) affecting securitygateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in SecurityGateway.dll in Alt-N Technologies SecurityGateway 1.0.1 allows remote attackers to execute arbitrary code via a long username parameter.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	74.6% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2008-09-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: alt-n

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

Am I affected?

Timeline

2008-09-24 11:42 UTCPublished CVE record published
2026-06-16 22:57 UTCUpdated Record last modified

alt-n securitygateway DOWNGRADE

Affected: 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.1 (Debian / Ubuntu)

apt-cache madison securitygateway sudo apt install securitygateway=<VERSION_BEFORE_1.0.1> sudo apt-mark hold securitygateway

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

dnf --showduplicates list securitygateway sudo dnf downgrade securitygateway-<VERSION_BEFORE_1.0.1> sudo dnf versionlock add securitygateway

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: Alt-N SecurityGateway 1.0.1 - 'Username' Remote Buffer Overflow (PoC)
Exploit-DB: Alt-N SecurityGateway 1.0.1 - 'Username' Remote Buffer Overflow (Metasploit)
Exploit-DB: Alt-N SecurityGateway 1.00-1.01 - Remote Stack Overflow
Metasploit: Alt-N SecurityGateway username 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-2008-4193?

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

Is CVE-2008-4193 being exploited?

CVE-2008-4193 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-2008-4193 affect?

CVE-2008-4193 affects securitygateway. Severity is high (CVSS 10.0). Stack-based buffer overflow in SecurityGateway.dll in Alt-N Technologies SecurityGateway 1.0.1 allows remote attackers to execute arbitrary code via a long username parameter.

How urgent is CVE-2008-4193?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2023-52269 MEDIUM 4.8 UPGRADE MDaemon SecurityGateway through 9.0.3 allows XSS via a crafted Message Content Filtering rule
CVE-2022-25356 MEDIUM 5.3 UPGRADE Alt-N MDaemon Security Gateway through 8.5.0 allows SecurityGateway.dll?view=login XML Injection.

References

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