CVE-2025-20350

CWE-121 — Stack-based Buffer OverflowCWE-79 — Cross-site Scripting (XSS)4 documents4 sources
Severity
7.5HIGH
EPSS
0.1%
top 77.79%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
18
Cisco IP Phone 7811 FirmwareCisco IP Phone 7821 FirmwareCisco IP Phone 7841 Firmware+15 more
Timeline
PublishedOct 15

Description

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 devic…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages18 packages

▶NVDcisco/video_phone_8875_firmware3.0\(1\) — 3.2\(1\)+2
▶NVDcisco/desk_phone_9841_firmware3.0\(1\) — 3.2\(1\)
▶NVDcisco/desk_phone_9851_firmware3.0\(1\) — 3.2\(1\)
▶NVDcisco/desk_phone_9861_firmware3.0\(1\) — 3.2\(1\)
▶NVDcisco/desk_phone_9871_firmware3.0\(1\) — 3.2\(1\)

🔴Vulnerability Details

2
GHSA
GHSA-c6wg-233f-cjj6: 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 Softw↗2025-10-15
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CVEList
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Firmware Denial of Service Vulnerability↗2025-10-15
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📋Vendor Advisories

1
Cisco
Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and Video Phone 8875 with SIP Software Vulnerabilities↗2025-10-15
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