How severe is CVE-1999-0524?

CVE-1999-0524 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-1999-0524 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0524?

CVE-1999-0524 primarily affects Apple Mac Os X. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0524?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0524 published?

CVE-1999-0524 was published on 1997-08-01 and last updated on 2026-06-16.

CVE-1999-0524

CVE-1999-0524 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 4.0. Its EPSS exploit-prediction score of 32% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
CVSS v2: 2.1
EPSS exploit prediction: 32% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Apple Mac Os X
Published: 1997-08-01
Last modified: 2026-06-16

Description

ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.

Frequently asked questions

What is CVE-1999-0524?: ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.
How severe is CVE-1999-0524?: CVE-1999-0524 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-1999-0524 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 32% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0524?: CVE-1999-0524 primarily affects Apple Mac Os X. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0524?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0524 published?: CVE-1999-0524 was published on 1997-08-01 and last updated on 2026-06-16.

References

Affected products (14)

cpe:2.3:o:apple:mac_os_x:-:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*
cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:*
cpe:2.3:o:hp:tru64:-:*:*:*:*:*:*:*
cpe:2.3:o:ibm:aix:-:*:*:*:*:*:*:*
cpe:2.3:o:ibm:os2:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
cpe:2.3:o:novell:netware:-:*:*:*:*:*:*:*
cpe:2.3:o:oracle:solaris:-:*:*:*:*:*:-:*
cpe:2.3:o:sco:sco_unix:-:*:*:*:*:*:*:*
cpe:2.3:o:sgi:irix:-:*:*:*:*:*:*:*
cpe:2.3:o:windriver:bsdos:-:*:*:*:*:*:*:*

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