Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability
Priority MEDIUM 46CWE-20Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03095 87th percentileScored 2026-11-07
Fix Fixed Cisco IP phone (Cisco): 12.7(1)
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco IP phone | before 12.7(1) | 12.7(1) | Patch available | CNA |
- Cisco IP phone VendorCisco Affected before 12.7(1) Fixed in 12.7(1) Patch available CNA
CPE configurations NVD · 54
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_conference_phone_7832_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_conference_phone_7832_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_conference_phone_7832:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_conference_phone_8832_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_conference_phone_8832_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_conference_phone_8832:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_6821_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_6841_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_conference_phone_7832_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_conference_phone_7832_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_conference_phone_7832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_conference_phone_8832_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_conference_phone_8832_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_conference_phone_8832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_6821_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_6841_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 44 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_6851_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6851:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_6861_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_6871_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6871:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8845_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* | before 12.7\(1\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8865_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 11.3\(1\)sr1 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:unified_ip_conference_phone_8831_firmware:*:*:*:*:*:*:*:* | before 10.3\(1\)sr6 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:unified_ip_conference_phone_8831:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:unified_ip_conference_phone_8831_for_third-party_call_control_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Cisco |
| cpe:2.3:h:cisco:unified_ip_conference_phone_8831_for_third-party_call_control:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:wireless_ip_phone_8821_firmware:*:*:*:*:*:*:*:* | before 11.0\(5\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:wireless_ip_phone_8821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:wireless_ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* | before 11.0\(5\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:wireless_ip_phone_8821-ex:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_6851_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6851:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_6861_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_6871_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6871:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8845_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* Versions before 12.7\(1\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8865_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 11.3\(1\)sr1 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:unified_ip_conference_phone_8831_firmware:*:*:*:*:*:*:*:* Versions before 10.3\(1\)sr6 Vulnerable ·Cisco
- cpe:2.3:h:cisco:unified_ip_conference_phone_8831:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:unified_ip_conference_phone_8831_for_third-party_call_control_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Cisco
- cpe:2.3:h:cisco:unified_ip_conference_phone_8831_for_third-party_call_control:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:wireless_ip_phone_8821_firmware:*:*:*:*:*:*:*:* Versions before 11.0\(5\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:wireless_ip_phone_8821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:wireless_ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* Versions before 11.0\(5\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:wireless_ip_phone_8821-ex:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
- Fix · CNA Cisco IP phone (Cisco) Fixed in 12.7(1)
Timeline
- 2026-10-02 Threatist record created from CVE-2020-3111
- 2026-10-03 Alias added: GHSA-w6xx-2hjv-77cm
References
More Cisco Ip Conference Phone 7832 Firmware vulnerabilities
- TI-2019-01261 Cisco IP Phone 7800 Series and 8800 Series Session Initiation Protocol XML Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2019-01542 Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability CVSS 3.0HIGH 7.5
- TI-2024-13373 Cisco IP Phone 7800, 8800, and 9800 Series Information Disclosure Vulnerability CVSS 3.1MEDIUM 5.3
- TI-2019-01310 Resource management flaw in Cisco IP Phone 8800 Series Software CVSS 3.1MEDIUM 6.5
- TI-2021-01106 Buffer overflow in Cisco IP Phones with Multiplatform Firmware CVSS 3.1MEDIUM 6.5
- TI-2021-13711 Cisco IP Phone Software Arbitrary File Read Vulnerability CVSS 3.1MEDIUM 5.5
Sources
- CVE-2020-3111 · CVE Program
- CVE-2020-3111 · NVD
- FIRST EPSS
- GHSA-w6xx-2hjv-77cm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences