How severe is CVE-2015-4240?

CVE-2015-4240 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-4240 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4240?

CVE-2015-4240 affects Cisco Ip Communicator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4240?

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

When was CVE-2015-4240 published?

CVE-2015-4240 was published on 2015-07-08 and last updated on 2026-06-17.

CVE-2015-4240

CVE-2015-4240 is a medium-severity vulnerability in Cisco Ip Communicator with a CVSS 2.0 base score of 5.0. 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: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ip Communicator
Published: 2015-07-08
Last modified: 2026-06-17

Description

Cisco IP Communicator 8.6(4) allows remote attackers to cause a denial of service (service outage) via an unspecified URL in a GET request, aka Bug ID CSCuu37656.

Frequently asked questions

What is CVE-2015-4240?: Cisco IP Communicator 8.6(4) allows remote attackers to cause a denial of service (service outage) via an unspecified URL in a GET request, aka Bug ID CSCuu37656.
How severe is CVE-2015-4240?: CVE-2015-4240 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2015-4240 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4240?: CVE-2015-4240 affects Cisco Ip Communicator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4240?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-4240 published?: CVE-2015-4240 was published on 2015-07-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:ip_communicator:8.6\(4\):*:*:*:*:*:*:*

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
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