Vulnerability in Cisco Session Initiation Protocol (Sip) Software
CVE-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 unauthenticated, remote attacker to write arbitrary files on an affected device. …
EPSS: 0.000 (15.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Cisco Session Initiation Protocol (Sip) Software — versions 12.1(1)SR1, 11.5(1), 10.3(2)
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-20335?
- CVE-2025-20335 is a medium-severity vulnerability in Cisco Session Initiation Protocol (Sip) Software, classified under Improper Access Control. CVSS score: 5.3/10. Published 2025-09-03.
- How severe is CVE-2025-20335?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2025-20335 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.