How severe is CVE-2015-5913?

CVE-2015-5913 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2015-5913 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5913?

CVE-2015-5913 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5913?

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

When was CVE-2015-5913 published?

CVE-2015-5913 was published on 2015-10-09 and last updated on 2026-06-17.

CVE-2015-5913

CVE-2015-5913 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Apple Mac Os X
Published: 2015-10-09
Last modified: 2026-06-17

Description

Heimdal, as used in Apple OS X before 10.11, allows remote attackers to conduct replay attacks against the SMB server via packet data that represents a Kerberos authenticated request.

Frequently asked questions

What is CVE-2015-5913?: Heimdal, as used in Apple OS X before 10.11, allows remote attackers to conduct replay attacks against the SMB server via packet data that represents a Kerberos authenticated request.
How severe is CVE-2015-5913?: CVE-2015-5913 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2015-5913 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5913?: CVE-2015-5913 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5913?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-5913 published?: CVE-2015-5913 was published on 2015-10-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

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