CVE-2002-2404: Buffer overflow in IISPop email server 1.161 and 1.181 allows remote attackers to cause a denial of service (c

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MEDIUM 5.0DOWNGRADE

CVE-2002-2404 is a medium-severity flaw (CVSS 5.0) affecting iispop. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in IISPop email server 1.161 and 1.181 allows remote attackers to cause a denial of service (crash) via a long request to the POP3 port (TCP port 110).

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-119
Published	2002-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: curtis specialty consulting

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

Am I affected?

Timeline

2002-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:01 UTCUpdated Record last modified

curtis specialty consulting iispop DOWNGRADE

Affected: 1.161 · 1.181

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.161

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.161 (Debian / Ubuntu)

apt-cache madison iispop sudo apt install iispop=<VERSION_BEFORE_1.161> sudo apt-mark hold iispop

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

dnf --showduplicates list iispop sudo dnf downgrade iispop-<VERSION_BEFORE_1.161> sudo dnf versionlock add iispop

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: IISPop 1.161/1.181 - Remote Buffer Overflow (Denial of Service) (PoC)

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-2002-2404?

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

Is CVE-2002-2404 being exploited?

CVE-2002-2404 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-2002-2404 affect?

CVE-2002-2404 affects iispop. Severity is medium (CVSS 5.0). Buffer overflow in IISPop email server 1.161 and 1.181 allows remote attackers to cause a denial of service (crash) via a long request to the POP3 port (TCP port 110).

How urgent is CVE-2002-2404?

Priority 44/100. Public exploit reference

References

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