CVE-2025-20335
published 2025-09-03CVE-2025-20335: A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an…
PriorityP336medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.33%
25.4th percentile
A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device.
This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system.
Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
Affected
128 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
| cisco | cisco_session_initiation_protocol_software | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vendor_cisco5.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Cisco
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
vendor_cisco·2025-09-03·CVSS 5.3
CVE-2025-20335 [MEDIUM] CWE-200 Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
Multiple vulnerabilities in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 with Cisco Session Initiation Protocol (SIP) Software could allow an unauthenticated, remote attacker to conduct arbitrary file write and information disclosure attacks on an affected device.
Note: To exploit these vulnerabilities, Web Access must be enabled on the phone. Web Access is disabled by default.
For more information about these vulnerabilities, see the Details section of this advisory.
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
Cisco
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
vendor_cisco·CVSS 3.1
CVE-2025-20335 Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
CVE-2025-20335: Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities
Multiple vulnerabilities in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 with Cisco Session Initiation Protocol (SIP) Software could allow an unauthenticated, remote attacker to conduct arbitrary file write and information disclosure attacks on an affected device. Note: To exploit these vulnerabilities, Web Access must be enabled on the phone. Web Access is disabled by default. For more information about these vulnerabilities, see the
CVSS: 3.1
CWE: CWE-200, CWE-284, CWE-200, CWE-284
Bug IDs: CSCwn51677, CSCwn51679, CSCwn52909, CSCwn51677, CSCwn51679
GHSA
GHSA-8v48-phm3-pw95: A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could al
ghsa_unreviewed·2026-01-05
CVE-2025-20335 [MEDIUM] CWE-284 GHSA-8v48-phm3-pw95: A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could al
A vulnerability in the directory permissions of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 could allow an unauthenticated, remote attacker to write arbitrary files on an affected device.
This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system.
Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-09-03
Published