CVE-2024-9043: Secure Email Gateway from Cellopoint has Buffer Overflow Vulnerability in authentication process

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2024-9043 is a critical-severity flaw (CVSS 9.8) affecting secure email gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Secure Email Gateway from Cellopoint has Buffer Overflow Vulnerability in authentication process. Remote unauthenticated attackers can send crafted packets to crash the process, thereby bypassing authentication and obtaining system administrator privileges.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2024-09-20
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: cellopoint

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-09-20 11:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

cellopoint secure email gateway UPGRADE

Affected: >= 4.2.1 and <= 4.5.0

Fixed in: newer than 4.5.0

Safe to downgrade to: a release before 4.2.1

1. Check installed version

apt-cache policy secure-email-gateway || rpm -q secure-email-gateway || secure-email-gateway --version

2. UPGRADE to newer than 4.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade secure-email-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade secure-email-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.2.1 (Debian / Ubuntu)

apt-cache madison secure-email-gateway sudo apt install secure-email-gateway=<VERSION_BEFORE_4.2.1> sudo apt-mark hold secure-email-gateway

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list secure-email-gateway sudo dnf downgrade secure-email-gateway-<VERSION_BEFORE_4.2.1> sudo dnf versionlock add secure-email-gateway

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.

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-2024-9043?

secure email gateway: upgrade to newer than 4.5.0. Exact commands for each OS are on this page.

Is CVE-2024-9043 being exploited?

CVE-2024-9043 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-2024-9043 affect?

CVE-2024-9043 affects secure email gateway. Severity is critical (CVSS 9.8). Secure Email Gateway from Cellopoint has Buffer Overflow Vulnerability in authentication process. Remote unauthenticated attackers can send crafted packets to crash the process, thereby bypassing authentication and obtaining system administ

How urgent is CVE-2024-9043?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

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CVE-2026-29132 HIGH 7.5 UPGRADE SEPPmail Secure Email Gateway before version 15.0.3 allows an attacker with access to a victim's GINA account

References

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