How severe is CVE-2015-4458?

CVE-2015-4458 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-4458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4458?

CVE-2015-4458 affects Cisco Adaptive Security Appliance Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4458?

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

When was CVE-2015-4458 published?

CVE-2015-4458 was published on 2015-07-18 and last updated on 2026-06-17.

CVE-2015-4458

CVE-2015-4458 is a medium-severity vulnerability in Cisco Adaptive Security Appliance Software with a CVSS 2.0 base score of 4.3. 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Cisco Adaptive Security Appliance Software
Published: 2015-07-18
Last modified: 2026-06-17

Description

The TLS implementation in the Cavium cryptographic-module firmware, as distributed with Cisco Adaptive Security Appliance (ASA) Software 9.1(5.21) and other products, does not verify the MAC field, which allows man-in-the-middle attackers to spoof TLS content by modifying packets, aka Bug ID CSCuu52976.

Frequently asked questions

What is CVE-2015-4458?: The TLS implementation in the Cavium cryptographic-module firmware, as distributed with Cisco Adaptive Security Appliance (ASA) Software 9.1(5.21) and other products, does not verify the MAC field, which allows man-in-the-middle attackers to spoof TLS content by modifying packets, aka Bug ID CSCuu52976.
How severe is CVE-2015-4458?: CVE-2015-4458 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-4458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4458?: CVE-2015-4458 affects Cisco Adaptive Security Appliance Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4458 published?: CVE-2015-4458 was published on 2015-07-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:adaptive_security_appliance_software:9.1.5.21:*:*:*:*:*:*:*

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