Cisco Video Phone 8875 and Desk Phone 9800 Series Information Disclosure Vulnerability
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.
Summary
A vulnerability in the debug shell of Cisco Video Phone 8875 and Cisco Desk Phone 9800 Series could allow an authenticated, local attacker to access sensitive information on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials with SSH access on the affected device. SSH access is disabled by default. This vulnerability is due to insufficient validation of user-supplied input by the debug shell of an affected device. An attacker could exploit this vulnerability by sending a crafted SSH client command to the CLI. A successful exploit could allow the attacker to access sensitive information on the underlying operating system.
Why it matters now
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 Session Initiation Protocol (SIP) Software | 3.1(1); 3.0(1); 2.3(1); 2.3(1)SR1; 2.2(1); 2.1(1); 2.0(1); 3.1(1)SR1; 3.2(1) | — | No fix listed | CNA |
- Cisco Session Initiation Protocol (SIP) Software VendorCisco Affected 3.1(1); 3.0(1); 2.3(1); 2.3(1)SR1; 2.2(1); 2.1(1); 2.0(1); 3.1(1)SR1; 3.2(1) Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:video_phone_8875_firmware:*:*:*:*:*:*:*:* | before 3.3\(1\) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:desk_phone_9871_firmware:*:*:*:*:*:*:*:* | before 3.3\(1\) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:desk_phone_9871:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:desk_phone_9841_firmware:*:*:*:*:*:*:*:* | before 3.3\(1\) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:desk_phone_9841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:desk_phone_9851_firmware:*:*:*:*:*:*:*:* | before 3.3\(1\) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:desk_phone_9851:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:desk_phone_9861_firmware:*:*:*:*:*:*:*:* | before 3.3\(1\) | Vulnerable | Cisco |
| cpe:2.3:h:cisco:desk_phone_9861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:video_phone_8875_firmware:*:*:*:*:*:*:*:* Versions before 3.3\(1\) Vulnerable ·Cisco
- cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:desk_phone_9871_firmware:*:*:*:*:*:*:*:* Versions before 3.3\(1\) Vulnerable ·Cisco
- cpe:2.3:h:cisco:desk_phone_9871:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:desk_phone_9841_firmware:*:*:*:*:*:*:*:* Versions before 3.3\(1\) Vulnerable ·Cisco
- cpe:2.3:h:cisco:desk_phone_9841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:desk_phone_9851_firmware:*:*:*:*:*:*:*:* Versions before 3.3\(1\) Vulnerable ·Cisco
- cpe:2.3:h:cisco:desk_phone_9851:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:desk_phone_9861_firmware:*:*:*:*:*:*:*:* Versions before 3.3\(1\) Vulnerable ·Cisco
- cpe:2.3:h:cisco:desk_phone_9861:-:*:*:*:*:*:*:* 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-2025-20158
- 2026-10-03 Alias added: GHSA-fppv-gxpq-7mg9
References
Advisory 1
More Cisco Desk Phone 9841 Firmware vulnerabilities
- TI-2025-14645 Stack-based buffer overflow in Cisco Session Initiation Protocol Software CVSS 3.1HIGH 7.5
- TI-2025-14631 Information disclosure in Cisco Session Initiation Protocol Software CVSS 3.1HIGH 7.5
- TI-2025-14646 Cross-site scripting in Cisco Session Initiation Protocol Software CVSS 3.1MEDIUM 6.1
- TI-2025-14630 Improper access control in Cisco Session Initiation Protocol Software CVSS 3.1MEDIUM 5.3
- TI-2024-13373 Cisco IP Phone 7800, 8800, and 9800 Series Information Disclosure Vulnerability CVSS 3.1MEDIUM 5.3
Sources
- CVE-2025-20158 · CVE Program
- CVE-2025-20158 · NVD
- FIRST EPSS
- GHSA-fppv-gxpq-7mg9 · 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