Resource management flaw in Cisco IP Phone 8800 Series Software
Priority LOW 30CWE-399Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
A vulnerability in the Cisco Discovery Protocol or Link Layer Discovery Protocol (LLDP) implementation for the Cisco IP Phone 7800 and 8800 Series could allow an unauthenticated, adjacent attacker to cause an affected phone to reload unexpectedly, resulting in a temporary denial of service (DoS) condition. The vulnerability is due to missing length validation of certain Cisco Discovery Protocol or LLDP packet header fields. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol or LLDP packet to the targeted phone. A successful exploit could allow the attacker to cause the affected phone to reload unexpectedly, resulting in a temporary DoS condition. Versions prior to 12.6(1)MN80 are affected.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0064 50th percentileScored 2026-11-07
Fix Fixed Cisco IP Phone 8800 Series Software (Cisco): 12.6(1)MN80
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 8800 Series Software | before 12.6(1)MN80 | 12.6(1)MN80 | Patch available | CNA |
- Cisco IP Phone 8800 Series Software VendorCisco Affected before 12.6(1)MN80 Fixed in 12.6(1)MN80 Patch available CNA
CPE configurations NVD · 28
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7800_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_conference_phone_7832_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | 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_7811_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7800_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_conference_phone_7832_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 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 12.6\(1\)mn80 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_7811_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 18 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | 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 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* | before 12.6\(1\)mn80 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 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 12.6\(1\)mn80 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 12.6\(1\)mn80 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 12.6\(1\)mn80 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 12.6\(1\)mn80 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_8845_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 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_8851_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 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 12.6\(1\)mn80 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_8865_firmware:*:*:*:*:*:*:*:* Versions before 12.6\(1\)mn80 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
- Fix · CNA Cisco IP Phone 8800 Series Software (Cisco) Fixed in 12.6(1)MN80
Timeline
- 2026-10-02 Threatist record created from CVE-2019-1684
- 2026-10-03 Alias added: GHSA-325p-cm4c-j6f9
- 2026-10-23 EPSS moved to the 50th–90th percentile
References
More Cisco Ip Conference Phone 7832 Firmware vulnerabilities
- TI-2020-02673 Cisco IP Phone Remote Code Execution and Denial of Service Vulnerability CVSS 3.1HIGH 8.8
- 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-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-2019-1684 · CVE Program
- CVE-2019-1684 · NVD
- FIRST EPSS
- GHSA-325p-cm4c-j6f9 · 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