CVE-2015-4226

highpriority · track · 29EPSS 0.028 · 86 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.75% (86th) EPSS

CVSS 7.1 · high

Is it mine?

2 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

The packet-storing feature on Cisco 9900 phones with firmware 9.3(2) does not properly support the RTP protocol, which allows remote attackers to cause a denial of service (device hang) by sending malformed RTP packets after a call is answered, aka Bug ID CSCur39976.

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–7.1

v2.07.1highAV:N/AC:M/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 6.9

v2.06mediumAV:N/AC:M/Au:N/C:N/I:N/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimary

affected products (2)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cisco unified ip phones 9900 series firmware= 9.3(2)nvdUScpe:2.3:o:cisco:unified_ip_phones_9900_series_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2015-06-30modified 2026-06-17

related (3,726)

Related entries.

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+3721 more

references (8)

External citations — patches, advisories, analysis.

http://tools.cisco.com/security/center/viewAlert.x?alertId=39554 cnnvd
https://tools.cisco.com/bugsearch/bug/CSCur39976Patchcnnvd
http://tools.cisco.com/security/center/viewAlert.x?alertId=39554 enisa_euvd
http://www.securityfocus.com/bid/75471 enisa_euvd
http://www.securitytracker.com/id/1032748 enisa_euvd
http://tools.cisco.com/security/center/viewAlert.x?alertId=39554Vendor Advisorynvd
http://www.securityfocus.com/bid/75471Third Party AdvisoryVDB Entrynvd
http://www.securitytracker.com/id/1032748Third Party AdvisoryVDB Entrynvd

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