- Description
- 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. This vulnerability is due to a lack of proper authentication controls. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to perform arbitrary file writes to specific directories in the underlying operating system. Note: To exploit this vulnerability, Web Access must be enabled on the phone. Web Access is disabled by default.
- Source
- psirt@cisco.com
- NVD status
- Analyzed
- Products
- desk_phone_9841_firmware, desk_phone_9851_firmware, desk_phone_9861_firmware, desk_phone_9871_firmware, ip_phone_7811_firmware, ip_phone_7821_firmware, ip_phone_7841_firmware, ip_phone_7861_firmware, ip_phone_8811_firmware, ip_phone_8841_firmware, ip_phone_8845_firmware, ip_phone_8851_firmware, ip_phone_8851nr_firmware, ip_phone_8861_firmware, ip_phone_8865_firmware, video_phone_8875_firmware, ip_phone_8821_firmware
CVSS 3.1
- Type
- Secondary
- Base score
- 5.3
- Impact score
- 1.4
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Severity
- MEDIUM
- psirt@cisco.com
- CWE-284
- Hype score
- Not currently trending
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 unauthent… https://t.co/ZuHYqME2M3
@CVEnew
3 Sept 2025
313 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
⚡ CVE-2025-20335: Cisco Desk Phone 9800 Series, IP Phone 7800 and 8800 Series, and ... Weak dir perms enable remote file writes - trivial path to pwn phones #S... https://t.co/ghfC70MEZY #netsec #vulnerability #CVE #sysadmin #zeroday
@0dayPublishing
3 Sept 2025
27 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
0 Quotes
[
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:desk_phone_9841_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "DF49016B-CAE6-4DE4-8449-04869029360B",
"versionEndExcluding": "3.3\\(1\\)",
"versionStartIncluding": "3.0\\(1\\)",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:desk_phone_9841:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8176E19D-B625-4891-9018-F42228F1266B",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:desk_phone_9851_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "643F71B7-91EF-433B-A4EE-DC0A4D7ABF03",
"versionEndExcluding": "3.3\\(1\\)",
"versionStartIncluding": "3.0\\(1\\)",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:desk_phone_9851:-:*:*:*:*:*:*:*",
"matchCriteriaId": "713F43A6-745A-4DAB-AD2D-3139E9E5C1A0",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:desk_phone_9861_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5B218261-3865-4179-A775-2DCF37C713C8",
"versionEndExcluding": "3.3\\(1\\)",
"versionStartIncluding": "3.0\\(1\\)",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:desk_phone_9861:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A8D01D5F-4EAE-4547-AB41-44F7885491C0",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:desk_phone_9871_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "45174807-089C-4E3C-9C02-1D6D8708BC49",
"versionEndExcluding": "3.3\\(1\\)",
"versionStartIncluding": "3.0\\(1\\)",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:desk_phone_9871:-:*:*:*:*:*:*:*",
"matchCriteriaId": "3D14CF47-7581-40E5-91A1-AC6BB5137358",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "7C71D54E-2D4A-4AA7-8E93-33214794B0B2",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7811_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "AC626E90-9019-4180-BE62-047B9864C34E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7811_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "5B747AA4-D45A-4A8E-BEB1-533CF085D1F8",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:*",
"matchCriteriaId": "D7260C17-7067-47AD-995F-366A5E8B10E7",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4D27D332-69A3-4CFF-AE61-AAA6B31FAFC1",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7821_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "C3E84980-7697-4479-A2E9-18E4BF3B991E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7821_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "88926FA9-41A2-4ECE-992F-B4200694BC7D",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:*",
"matchCriteriaId": "AE7AFFF0-5B21-400B-B923-E9B7FCCE08FA",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A2072265-6A36-4DB7-8722-C288AFA695FB",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7841_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "80A9D20F-985B-4500-94A8-05DECE565C20",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7841_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "11F0AAF5-913C-4FC2-9345-21F713985F24",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:*",
"matchCriteriaId": "73CF8A50-11BD-4506-BF2A-CCA36BF59EFF",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "8D70C616-D775-41EB-BC7D-113F817B22EA",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7861_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "967D674B-9925-4AE7-AED6-751046960403",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_7861_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "C379DA9E-FEEE-468E-BBE2-7EF498010B30",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:*",
"matchCriteriaId": "E52C420C-FD54-4BE4-8720-E05307D53520",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "371ABCD4-DF50-4815-B02C-38D0505874FD",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8811_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "8CEBC653-2CED-4B2D-9890-B789F33DFE8B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8811_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "62BAFED6-BDE9-47FA-A632-7920A4AD32B3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:*",
"matchCriteriaId": "D0CC3127-3152-4906-9FE0-BC6F21DCADAA",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E0C291D5-EEF2-4CEF-9C2D-E4F067AEE5A5",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8841_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "B27034E5-2F4B-4210-8A80-6A6362F8C980",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8841_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "965852CD-DBCC-4AAE-AD00-C29B0933005D",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:*",
"matchCriteriaId": "7944CC9C-AE08-4F30-AF65-134DADBD0FA1",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "50A18EDF-71F8-4B26-B5E7-1742831695E4",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8845_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "C1B44331-2BA1-402E-9317-8A3C97B646C6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8845_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "F716386E-44D5-462C-8FB5-FEF754256BC9",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:*",
"matchCriteriaId": "A313E64A-F43C-4FBA-A389-6171CBD709C0",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0C56F335-2124-4806-8F30-9C67367BB44D",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "3CE7C15E-BD09-40C4-8187-7E523BFC0899",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "24DD015B-C863-4F9C-8B97-729272586D87",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:*",
"matchCriteriaId": "8AF6DC5E-F582-445E-BF05-2D55A0954663",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851nr_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9D47B048-D47B-45E1-BD25-C19A6B7CC55A",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851nr_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "247B120C-20A0-4F0D-B9E6-C252ECF6194C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8851nr_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "1FD5202B-453C-49E1-A6CD-810C033380BA",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8851nr:-:*:*:*:*:*:*:*",
"matchCriteriaId": "23BB2274-7668-4B80-9FF2-EC724C44685B",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "196320B1-DC92-4D24-A34F-C1287B8382BE",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8861_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "6AD2886B-D249-4B2C-933F-1E81889FB9F6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8861_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "63457A22-1F0D-4E01-8D6D-EDAD920E8BE5",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:*",
"matchCriteriaId": "090EE553-01D5-45F0-87A4-E1167F46EB77",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6A5C0983-4639-48E7-BE52-E69629EB802B",
"versionEndExcluding": "14.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8865_firmware:14.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "8B1CAB0B-ACB7-4AE1-B21C-FEC8D57F490E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8865_firmware:14.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "C207966D-C755-455F-B266-02FAD5CD3412",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:*",
"matchCriteriaId": "BB99B9AB-64B5-4989-9579-A1BB5D2D87EF",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:video_phone_8875_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C76337A0-E138-4227-A0F1-9CF635EECC14",
"versionEndExcluding": "2.3\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:video_phone_8875_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E930C776-5D3B-4F40-9F38-A8135AA6D9CB",
"versionEndExcluding": "3.3\\(1\\)",
"versionStartIncluding": "3.0\\(1\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:video_phone_8875_firmware:2.3\\(1\\):-:*:*:*:*:*:*",
"matchCriteriaId": "41019D10-27B9-4DA6-9DF3-780D0A7EE75C",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:video_phone_8875_firmware:2.3\\(1\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "690E8866-FF2F-4C72-8510-1E587B535A42",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:video_phone_8875:-:*:*:*:*:*:*:*",
"matchCriteriaId": "CC9019DD-6941-42F3-8B66-1F3CDDDA86E7",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:*:*:*:*:*:*:*:*",
"matchCriteriaId": "54AA3288-EAFA-41FB-9532-9BA69C03F130",
"versionEndExcluding": "11.0\\(6\\)",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):-:*:*:*:*:*:*",
"matchCriteriaId": "FBB24293-E296-4ABC-A887-09B741702F09",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):sr1:*:*:*:*:*:*",
"matchCriteriaId": "0A82BD02-5781-489F-8112-DA59E998F36A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):sr2:*:*:*:*:*:*",
"matchCriteriaId": "3DED54C3-AB49-4030-98C3-4D4BD3D220D2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):sr4:*:*:*:*:*:*",
"matchCriteriaId": "B9C7E266-6BA9-47EB-AF37-0A948C780D5D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):sr5:*:*:*:*:*:*",
"matchCriteriaId": "6FC9887F-0F65-4FA5-95A4-95BAB70C03FE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ip_phone_8821_firmware:11.0\\(6\\):sr6:*:*:*:*:*:*",
"matchCriteriaId": "097229AD-1840-4AB3-8120-0261DCA50986",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:h:cisco:ip_phone_8821:-:*:*:*:*:*:*:*",
"matchCriteriaId": "36C99E0B-0383-4CB3-B325-EC0F3D57D39D",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
]