CVE-2025-20351A 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 attack…
Updated under an hour ago ()
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It affects cisco desk_phone_9871_firmware and 16 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 conduct XSS attacks against a user of the web UI. This vulnerability exists because the web UI of an affected device does not sufficiently validate user-supplied input. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. 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.
- CVSS
- 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
cisco desk_phone_9871_firmware cisco:desk_phone_9871_firmware | from 3.0\(1\) through 3.2\(1\) | NVD |
cisco desk_phone_9841_firmware cisco:desk_phone_9841_firmware | from 3.0\(1\) through 3.2\(1\) | NVD |
cisco desk_phone_9851_firmware cisco:desk_phone_9851_firmware | from 3.0\(1\) through 3.2\(1\) | NVD |
cisco desk_phone_9861_firmware cisco:desk_phone_9861_firmware | from 3.0\(1\) through 3.2\(1\) | NVD |
cisco ip_phone_8865_firmware cisco:ip_phone_8865_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_7811_firmware cisco:ip_phone_7811_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_7821_firmware cisco:ip_phone_7821_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_7841_firmware cisco:ip_phone_7841_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_7861_firmware cisco:ip_phone_7861_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8811_firmware cisco:ip_phone_8811_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8832_firmware cisco:ip_phone_8832_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8841_firmware cisco:ip_phone_8841_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8845_firmware cisco:ip_phone_8845_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8851_firmware cisco:ip_phone_8851_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8861_firmware cisco:ip_phone_8861_firmware | before 14.3\(1\); 14.3(1); 14.3(1) | NVD |
cisco ip_phone_8821_firmware cisco:ip_phone_8821_firmware | before 11.0\(1\); 11.0(0.7); 11.0(1); 11.0(2); 11.0(2); 11.0(2); 11.0(3); 11.0(3); and 19 more ranges | NVD |
cisco video_phone_8875_firmware cisco:video_phone_8875_firmware | before 2.3\(1\); from 3.0\(1\) through 3.2\(1\); 2.3(1); 2.3(1) | NVD |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-phone-dos-FPyjLV7Avendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.