Authentication bypass in Cisco IP Phones with Multiplatform Firmware
Priority MEDIUM 40CWE-305Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
A vulnerability in the web-based management interface of Cisco IP Phone firmware could allow an unauthenticated, remote attacker to retrieve sensitive information from an affected device. This vulnerability is due to a lack of authentication for specific endpoints of the web-based management interface on an affected device. An attacker could exploit this vulnerability by connecting to the affected device. A successful exploit could allow the attacker to gain unauthorized access to the device, enabling the recording of user credentials and traffic to and from the affected device, including VoIP calls that could be replayed.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0081 57th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco IP Phones with Multiplatform Firmware | 11.3.1 MSR2-6; 11.3.1 MSR3-3; 11.3.2; 11.3.3; 11.3.1 MSR4-1; 11.3.4; 11.3.5; 11.3.3 MSR2; 11.3.3 MSR1; 11.3.6; 11-3-1MPPSR4UPG; 11.3.7; 11-3-1MSR2UPG; 11.3.6SR1; 11.3.7SR1; 11.3.7SR2; 11.0.0; 11.0.1; 11.0.1 MSR1-1; 11.0.2; 11.1.1; 11.1.1 MSR1-1; 11.1.1 MSR2-1; 11.1.2; 11.1.2 MSR1-1; 11.1.2 MSR3-1; 11.2.1; 11.2.2; 11.2.3; 11.2.3 MSR1-1; 11.2.4; 11.3.1; 11.3.1 MSR1-3; 4.5; 4.6 MSR1; 4.7.1; 4.8.1; 4.8.1 SR1; 5.0.1; 12.0.1; 12.0.2; 12.0.3; 12.0.3SR1; 12.0.4; 5.1.1; 5.1.2; 5.1(2)SR1 | — | No fix listed | CNA |
| Cisco | Cisco PhoneOS | 1.0.1; 2.1.1; 2.0.1; 2.3.1 | — | No fix listed | CNA |
- Cisco IP Phones with Multiplatform Firmware VendorCisco Affected 11.3.1 MSR2-6; 11.3.1 MSR3-3; 11.3.2; 11.3.3; 11.3.1 MSR4-1; 11.3.4; 11.3.5; 11.3.3 MSR2; 11.3.3 MSR1; 11.3.6; 11-3-1MPPSR4UPG; 11.3.7; 11-3-1MSR2UPG; 11.3.6SR1; 11.3.7SR1; 11.3.7SR2; 11.0.0; 11.0.1; 11.0.1 MSR1-1; 11.0.2; 11.1.1; 11.1.1 MSR1-1; 11.1.1 MSR2-1; 11.1.2; 11.1.2 MSR1-1; 11.1.2 MSR3-1; 11.2.1; 11.2.2; 11.2.3; 11.2.3 MSR1-1; 11.2.4; 11.3.1; 11.3.1 MSR1-3; 4.5; 4.6 MSR1; 4.7.1; 4.8.1; 4.8.1 SR1; 5.0.1; 12.0.1; 12.0.2; 12.0.3; 12.0.3SR1; 12.0.4; 5.1.1; 5.1.2; 5.1(2)SR1 Fixed in — No fix listed CNA
- Cisco PhoneOS VendorCisco Affected 1.0.1; 2.1.1; 2.0.1; 2.3.1 Fixed in — No fix listed CNA
CPE configurations NVD · 44
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_6841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_6841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_6821_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_6841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_6841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_6851_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
Show 34 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_6861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_6871_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851nr_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851nr_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8851nr:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* | 12.0.4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:video_phone_8875_with_multiplatform_firmware:*:*:*:*:*:*:*:* | before 2.3.1.0101 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_6861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_6871_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7811_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7821_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_7861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8811_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8841_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8851_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 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_8851nr_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8851nr_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8851nr:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 12.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ip_phone_8861_with_multiplatform_firmware:12.0.4:-:*:*:*:*:*:* Versions 12.0.4 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:video_phone_8875_with_multiplatform_firmware:*:*:*:*:*:*:*:* Versions before 2.3.1.0101 Vulnerable ·Cisco
- cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-20378
- 2026-10-03 Alias added: GHSA-q87c-gjjf-xqfw
References
Advisory 1
More Cisco Ip Phone 6821 With Multiplatform Firmware vulnerabilities
- TI-2024-13309 Out-of-bounds write in Cisco IP Phones with Multiplatform Firmware CVSS 3.1HIGH 7.5
- TI-2024-13290 Out-of-bounds write in Cisco IP Phones with Multiplatform Firmware CVSS 3.1MEDIUM 5.9
- TI-2023-06927 Cross-site request forgery in Cisco IP Phones with Multiplatform Firmware CVSS 3.1MEDIUM 6.5
- TI-2021-01106 Buffer overflow in Cisco IP Phones with Multiplatform Firmware CVSS 3.1MEDIUM 6.5
- TI-2024-13458 Cisco IP Phone 6800, 7800, 8800, and 9800 Series with Multiplatform Firmware Stored Cross-Site Scripting Vulnerability CVSS 3.1MEDIUM 4.8
- TI-2024-13457 Cisco IP Phone 6800, 7800, 8800, and 9800 Series with Multiplatform Firmware Stored Cross-Site Scripting Vulnerabilities CVSS 3.1MEDIUM 4.8
Sources
- CVE-2024-20378 · CVE Program
- CVE-2024-20378 · NVD
- FIRST EPSS
- GHSA-q87c-gjjf-xqfw · 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