CVE-2007-2820: Multiple stack-based buffer overflows in the KSign KSignSWAT ActiveX Control (AxKSignSWAT.dll) 2.0.3.3 allow r

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HIGH 7.5DOWNGRADE

CVE-2007-2820 is a high-severity flaw (CVSS 7.5) affecting ksignswat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple stack-based buffer overflows in the KSign KSignSWAT ActiveX Control (AxKSignSWAT.dll) 2.0.3.3 allow remote attackers to execute arbitrary code via long arguments to the (1) SWAT_Init, (2) SWAT_InitEx, (3) SWAT_InitEx2, (4) SWAT_InitEx3, and (5) SWAT_Login functions.

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	2007-05-22
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ksign

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

Am I affected?

Timeline

2007-05-22 21:30 UTCPublished CVE record published
2026-06-16 22:40 UTCUpdated Record last modified

ksign ksignswat DOWNGRADE

Affected: 2.0.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.3.3

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.0.3.3 (Debian / Ubuntu)

apt-cache madison ksignswat sudo apt install ksignswat=<VERSION_BEFORE_2.0.3.3> sudo apt-mark hold ksignswat

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

dnf --showduplicates list ksignswat sudo dnf downgrade ksignswat-<VERSION_BEFORE_2.0.3.3> sudo dnf versionlock add ksignswat

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: KSign KSignSWAT 2.0.3.3 - ActiveX Control 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-2007-2820?

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

Is CVE-2007-2820 being exploited?

CVE-2007-2820 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-2007-2820 affect?

CVE-2007-2820 affects ksignswat. Severity is high (CVSS 7.5). Multiple stack-based buffer overflows in the KSign KSignSWAT ActiveX Control (AxKSignSWAT.dll) 2.0.3.3 allow remote attackers to execute arbitrary code via long arguments to the (1) SWAT_Init, (2) SWAT_InitEx, (3) SWAT_InitEx2, (4) SWAT_Ini

How urgent is CVE-2007-2820?

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

References

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