How severe is CVE-2015-6326?

CVE-2015-6326 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2015-6326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6326?

CVE-2015-6326 primarily affects Cisco Adaptive Security Appliance Software. In total, 181 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6326?

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-2015-6326 published?

CVE-2015-6326 was published on 2015-10-25 and last updated on 2026-06-17.

CVE-2015-6326

CVE-2015-6326 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software with a CVSS 2.0 base score of 7.8. 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-399.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Adaptive Security Appliance Software
Published: 2015-10-25
Last modified: 2026-06-17

Description

Cisco Adaptive Security Appliance (ASA) software 7.2 and 8.2 before 8.2(5.58), 8.3 and 8.4 before 8.4(7.29), 8.5 through 8.7 before 8.7(1.17), 9.0 before 9.0(4.37), 9.1 before 9.1(6.6), 9.2 before 9.2(4), 9.3 before 9.3(3.5), and 9.4 before 9.4(1.5) allows remote attackers to cause a denial of service (device reload) via a crafted DNS response, aka Bug ID CSCuu07799.

Frequently asked questions

What is CVE-2015-6326?: Cisco Adaptive Security Appliance (ASA) software 7.2 and 8.2 before 8.2(5.58), 8.3 and 8.4 before 8.4(7.29), 8.5 through 8.7 before 8.7(1.17), 9.0 before 9.0(4.37), 9.1 before 9.1(6.6), 9.2 before 9.2(4), 9.3 before 9.3(3.5), and 9.4 before 9.4(1.5) allows remote attackers to cause a denial of service (device reload) via a crafted DNS response, aka Bug ID CSCuu07799.
How severe is CVE-2015-6326?: CVE-2015-6326 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2015-6326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6326?: CVE-2015-6326 primarily affects Cisco Adaptive Security Appliance Software. In total, 181 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6326?: 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-2015-6326 published?: CVE-2015-6326 was published on 2015-10-25 and last updated on 2026-06-17.

References

Affected products (181)

cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.1.9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.1.13:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.1.19:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.1.24:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.10:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.14:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.18:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.19:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.22:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.2.34:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.3:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.3.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.3.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.3.16:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.6:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.18:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.25:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.27:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.30:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.4.33:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.4:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.7:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.8:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.10:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.12:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:7.2.5.16:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.0.45:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.1.11:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.2.9:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.2.10:*:*:*:*:*:*:*
cpe:2.3:o:cisco:adaptive_security_appliance_software:8.2.2.12:*:*:*:*:*:*:*

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