How severe is CVE-1999-0399?

CVE-1999-0399 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-1999-0399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0399?

CVE-1999-0399 affects Khaled Mardam-bey Mirc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-1999-0399 published?

CVE-1999-0399 was published on 1999-01-01 and last updated on 2026-06-16.

CVE-1999-0399

CVE-1999-0399 is a high-severity vulnerability in Khaled Mardam-bey Mirc with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Khaled Mardam-bey Mirc
Published: 1999-01-01
Last modified: 2026-06-16

Description

The DCC server command in the Mirc 5.5 client doesn't filter characters from file names properly, allowing remote attackers to place a malicious file in a different location, possibly allowing the attacker to execute commands.

Frequently asked questions

What is CVE-1999-0399?: The DCC server command in the Mirc 5.5 client doesn't filter characters from file names properly, allowing remote attackers to place a malicious file in a different location, possibly allowing the attacker to execute commands.
How severe is CVE-1999-0399?: CVE-1999-0399 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-1999-0399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0399?: CVE-1999-0399 affects Khaled Mardam-bey Mirc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-0399 published?: CVE-1999-0399 was published on 1999-01-01 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0399

Affected products (1)

cpe:2.3:a:khaled_mardam-bey:mirc:5.5:*:*:*:*:*:*:*

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