How severe is CVE-2015-6357?

CVE-2015-6357 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2015-6357 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-2015-6357?

CVE-2015-6357 primarily affects Cisco Firesight System Software. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6357?

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

When was CVE-2015-6357 published?

CVE-2015-6357 was published on 2015-11-18 and last updated on 2026-06-17.

CVE-2015-6357

CVE-2015-6357 is a medium-severity vulnerability in Cisco Firesight System Software 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Firesight System Software
Published: 2015-11-18
Last modified: 2026-06-17

Description

The rule-update feature in Cisco FireSIGHT Management Center (MC) 5.2 through 5.4.0.1 does not verify the X.509 certificate of the support.sourcefire.com SSL server, which allows man-in-the-middle attackers to spoof this server and provide an invalid package, and consequently execute arbitrary code, via a crafted certificate, aka Bug ID CSCuw06444.

Frequently asked questions

What is CVE-2015-6357?: The rule-update feature in Cisco FireSIGHT Management Center (MC) 5.2 through 5.4.0.1 does not verify the X.509 certificate of the support.sourcefire.com SSL server, which allows man-in-the-middle attackers to spoof this server and provide an invalid package, and consequently execute arbitrary code, via a crafted certificate, aka Bug ID CSCuw06444.
How severe is CVE-2015-6357?: CVE-2015-6357 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2015-6357 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-2015-6357?: CVE-2015-6357 primarily affects Cisco Firesight System Software. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6357?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6357 published?: CVE-2015-6357 was published on 2015-11-18 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:cisco:firesight_system_software:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.3.1.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.4.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firesight_system_software:5.4.0.1:*:*:*:*:*:*:*

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