CVE-2025-20350

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
ciscoCNA
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 55%
VendorProductVersion
ciscodesk_phone_9871_firmware
3.0\(1\) ≤
𝑥
≤ 3.2\(1\)
ciscodesk_phone_9841_firmware
3.0\(1\) ≤
𝑥
≤ 3.2\(1\)
ciscodesk_phone_9851_firmware
3.0\(1\) ≤
𝑥
≤ 3.2\(1\)
ciscodesk_phone_9861_firmware
3.0\(1\) ≤
𝑥
≤ 3.2\(1\)
ciscoip_phone_8865_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8865_firmware
14.3\(1\)
ciscoip_phone_8865_firmware
14.3\(1\):sr1
ciscoip_phone_7811_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_7811_firmware
14.3\(1\)
ciscoip_phone_7811_firmware
14.3\(1\):sr1
ciscoip_phone_7821_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_7821_firmware
14.3\(1\)
ciscoip_phone_7821_firmware
14.3\(1\):sr1
ciscoip_phone_7841_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_7841_firmware
14.3\(1\)
ciscoip_phone_7841_firmware
14.3\(1\):sr1
ciscoip_phone_7861_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_7861_firmware
14.3\(1\)
ciscoip_phone_7861_firmware
14.3\(1\):sr1
ciscoip_phone_8811_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8811_firmware
14.3\(1\)
ciscoip_phone_8811_firmware
14.3\(1\):sr1
ciscoip_phone_8832_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8832_firmware
14.3\(1\)
ciscoip_phone_8832_firmware
14.3\(1\):sr1
ciscoip_phone_8841_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8841_firmware
14.3\(1\)
ciscoip_phone_8841_firmware
14.3\(1\):sr1
ciscoip_phone_8845_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8845_firmware
14.3\(1\)
ciscoip_phone_8845_firmware
14.3\(1\):sr1
ciscoip_phone_8851_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8851_firmware
14.3\(1\)
ciscoip_phone_8851_firmware
14.3\(1\):sr1
ciscoip_phone_8861_firmware
𝑥
< 14.3\(1\)
ciscoip_phone_8861_firmware
14.3\(1\)
ciscoip_phone_8861_firmware
14.3\(1\):sr1
ciscovideo_phone_8875_firmware
𝑥
< 2.3\(1\)
ciscovideo_phone_8875_firmware
3.0\(1\) ≤
𝑥
≤ 3.2\(1\)
ciscovideo_phone_8875_firmware
2.3\(1\)
ciscovideo_phone_8875_firmware
2.3\(1\):sr1
ciscoip_phone_8821_firmware
𝑥
< 11.0\(1\)
ciscoip_phone_8821_firmware
11.0\(0.7\):mpp
ciscoip_phone_8821_firmware
11.0\(1\)
ciscoip_phone_8821_firmware
11.0\(2\)
ciscoip_phone_8821_firmware
11.0\(2\):sr1
ciscoip_phone_8821_firmware
11.0\(2\):sr2
ciscoip_phone_8821_firmware
11.0\(3\)
ciscoip_phone_8821_firmware
11.0\(3\):sr1
ciscoip_phone_8821_firmware
11.0\(3\):sr2
ciscoip_phone_8821_firmware
11.0\(3\):sr3
ciscoip_phone_8821_firmware
11.0\(3\):sr4
ciscoip_phone_8821_firmware
11.0\(3\):sr5
ciscoip_phone_8821_firmware
11.0\(3\):sr6
ciscoip_phone_8821_firmware
11.0\(4\)
ciscoip_phone_8821_firmware
11.0\(4\):sr1
ciscoip_phone_8821_firmware
11.0\(4\):sr2
ciscoip_phone_8821_firmware
11.0\(4\):sr3
ciscoip_phone_8821_firmware
11.0\(5\)
ciscoip_phone_8821_firmware
11.0\(5\):sr1
ciscoip_phone_8821_firmware
11.0\(5\):sr2
ciscoip_phone_8821_firmware
11.0\(5\):sr3
ciscoip_phone_8821_firmware
11.0\(6\)
ciscoip_phone_8821_firmware
11.0\(6\):sr1
ciscoip_phone_8821_firmware
11.0\(6\):sr2
ciscoip_phone_8821_firmware
11.0\(6\):sr4
ciscoip_phone_8821_firmware
11.0\(6\):sr5
ciscoip_phone_8821_firmware
11.0\(6\):sr6
𝑥
= Vulnerable software versions