CVE-2025-20350
What it is
A vulnerability in the web UI of Cisco Desk Phone 9800 Series, Cisco IP Phone 7800 and 8800 Series, and Cisco Video Phone 8875 running Cisco SIP Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to a buffer overflow when an affected device processes HTTP packets. An attacker could exploit this vulnerability by sending crafted HTTP input to the device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: To exploit this vulnerability, the phone must be registered to Cisco Unified Communications Manager and have Web Access enabled. Web Access is disabled by default.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.5% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-121
- Record status
- Analyzed
Affected
- Cisco Desk Phone 9871 Firmware ≤ 3.2\(1\)
- Cisco Desk Phone 9841 Firmware ≤ 3.2\(1\)
- Cisco Desk Phone 9851 Firmware ≤ 3.2\(1\)
- Cisco Desk Phone 9861 Firmware ≤ 3.2\(1\)
- Cisco Ip Phone 8865 Firmware < 14.3\(1\)
- Cisco Ip Phone 8865 Firmware 14.3\(1\)
- Cisco Ip Phone 7811 Firmware < 14.3\(1\)
- Cisco Ip Phone 7811 Firmware 14.3\(1\)
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2025-20350.md and follow it. Check whether this project is affected by CVE-2025-20350. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
