CVE-2024-24736: The POP3 service in YahooPOPs (aka YPOPs!) 1.6 allows a remote denial of service (reboot) via a long string to

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HIGH 7.5REMOTEDOWNGRADE

CVE-2024-24736 is a high-severity flaw (CVSS 7.5) affecting ypops\!. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The POP3 service in YahooPOPs (aka YPOPs!) 1.6 allows a remote denial of service (reboot) via a long string to TCP port 110, a related issue to CVE-2004-1558.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-01-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ypopsemail

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

Am I affected?

Timeline

2024-01-29 04:15 UTCPublished CVE record published
2026-06-17 07:14 UTCUpdated Record last modified

ypopsemail ypops\! DOWNGRADE

Affected: 1.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.6 (Debian / Ubuntu)

apt-cache madison ypops sudo apt install ypops=<VERSION_BEFORE_1.6> sudo apt-mark hold ypops

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

dnf --showduplicates list ypops sudo dnf downgrade ypops-<VERSION_BEFORE_1.6> sudo dnf versionlock add ypops

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-2024-24736?

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

Is CVE-2024-24736 being exploited?

CVE-2024-24736 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-2024-24736 affect?

CVE-2024-24736 affects ypops\!. Severity is high (CVSS 7.5). The POP3 service in YahooPOPs (aka YPOPs!) 1.6 allows a remote denial of service (reboot) via a long string to TCP port 110, a related issue to CVE-2004-1558.

How urgent is CVE-2024-24736?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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