Cisco IP Phones vulnerabilities: known CVEs & security history
Cisco · Actively exploited · 8 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Cisco IP Phones release lines — 8 in total. A CVE here doesn't mean your version is affected — check Cisco IP Phones's current status and the safe version to run.
Known Cisco IP Phones CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2015-4226 | high | 7.1 | 3% | 2015 |
| CVE-2013-5533 | medium | 6 | 0% | 2013 |
| CVE-2014-0658 | medium | 5.4 | 3% | 2014 |
| CVE-2015-0602 | medium | 5 | 1% | 2015 |
| CVE-2015-0600 | medium | 5 | 2% | 2015 |
| CVE-2013-5532 | medium | 5 | 2% | 2013 |
| CVE-2013-3426 | medium | 5 | 1% | 2013 |
| CVE-2015-0603 | medium | 4.6 | 0% | 2015 |
Is my Cisco IP Phones version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Cisco IP Phones version → · Monitor Cisco IP Phones for new CVEs →
Cisco IP Phones vulnerabilities — frequently asked
How many known vulnerabilities does Cisco IP Phones have?
IsItPatched tracks 8 CVEs for Cisco IP Phones. 0 are critical-severity and 1 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Cisco IP Phones have any actively-exploited vulnerabilities?
None of Cisco IP Phones's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Cisco IP Phones vulnerability?
Among tracked issues, CVE-2015-4226 (HIGH, CVSS 7.1) ranks highest — a CWE-399 weakness.
Is Cisco IP Phones safe to use?
It depends on the version. The latest supported Cisco IP Phones release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Cisco IP Phones security status · Cisco IP Phones end-of-life · actively-exploited CVEs. Always verify against Cisco's advisories — see our disclaimer.