CVE-2021-34711 json
Cisco IP Phone Software Arbitrary File Read Vulnerability
published 2021-10-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21361
- cvss
- 5.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
A vulnerability in the debug shell of Cisco IP Phone software could allow an authenticated, local attacker to read any file on the device file system. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by providing crafted input to a debug shell command. A successful exploit could allow the attacker to read any file on the device file system.
Patch / fix
- cisco ip_conference_phone_7832_firmware 14.1\(1\)
- cisco ip_conference_phone_8832_firmware 14.1\(1\)
- cisco ip_phone_7811_firmware 14.1\(1\)
- cisco ip_phone_7821_firmware 14.1\(1\)
- cisco ip_phone_7832_firmware 14.1\(1\)
- cisco ip_phone_7841_firmware 14.1\(1\)
- cisco ip_phone_7861_firmware 14.1\(1\)
- cisco ip_phone_8811_firmware 14.1\(1\)
- cisco ip_phone_8831_firmware 14.1\(1\)
- cisco ip_phones_8832_firmware 14.1\(1\)
- cisco ip_phone_8841_firmware 14.1\(1\)
- cisco ip_phone_8845_firmware 14.1\(1\)
- cisco ip_phone_8851_firmware 14.1\(1\)
- cisco ip_phone_8861_firmware 14.1\(1\)
- cisco ip_phone_8865_firmware 14.1\(1\)
- cisco wireless_ip_phone_8821_firmware 11.0\(6\)sr2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Cisco Cisco IP Phones with Multiplatform Firmware
Classification
References
Sources
- CVE List CVE-2021-34711
- NVD CVE-2021-34711
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