Read the docs
TI-2018-00348 Aliases CVE-2018-0389GHSA-wv94-3p8w-fgm3

Cisco Small Business SPA514G IP Phones SIP Denial of Service Vulnerability

Priority MEDIUM 44CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.

Summary

A vulnerability in the implementation of Session Initiation Protocol (SIP) processing in Cisco Small Business SPA514G IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. Cisco has not released software updates that address this vulnerability. This vulnerability affects Cisco Small Business SPA514G IP Phones that are running firmware release 7.6.2SR2 or earlier.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02516 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Small Business SPA500 Series IP Phonesup to 7.6.2SR2—No fix listedCNA
  • Cisco Small Business SPA500 Series IP Phones VendorCisco Affected up to 7.6.2SR2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:spa514g_firmware:*:*:*:*:*:*:*:*up to 7.6.2sr2VulnerableCisco
cpe:2.3:h:cisco:spa514g:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:spa514g_firmware:*:*:*:*:*:*:*:* Versions up to 7.6.2sr2 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:spa514g:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0389
  2. 2026-10-03 Alias added: GHSA-wv94-3p8w-fgm3

References

Advisory 1

  • TI-2019-01309 Cisco SPA112, SPA525, and SPA5x5 Series IP Phones Certificate Validation Vulnerability CVSS 3.1HIGH 7.4
  • TI-2019-01543 Cisco Small Business SPA500 Series IP Phones Local Command Execution Vulnerability CVSS 3.1MEDIUM 6.6
  • TI-2023-06924 Cross-site scripting in Cisco Small Business IP Phones CVSS 3.1MEDIUM 6.1
  • TI-2023-06887 Cross-site scripting in Cisco Small Business IP Phones CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences