CVE-2023-20018
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series...
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
8.6
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.
- Record
CVE-2023-20018- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-288
- Updated
- 2026-11-02
EUVDEUVD-2023-24197
8.6
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.
- Record
EUVD-2023-24197- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jc6w-v2gh-gqx3
6.5
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series...
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.
- Record
GHSA-jc6w-v2gh-gqx3- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-288, CWE-863
- Updated
- 2026-11-02
NVD
8.6
A vulnerability in the web-based management interface of Cisco IP Phone 7800 and 8800 Series Phones could allow an unauthenticated, remote attacker to bypass authentication on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface. A successful exploit could allow the attacker to access certain parts of the web interface that would normally require authentication.
- Record
CVE-2023-20018- CVSS 3.1
- 8.6 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-288, CWE-863
- Updated
- 2026-11-02
Affected products
- cisco session initiation protocol (sip) software
- cisco ip phone 7800 firmware
- cisco ip phone 7811 firmware
- cisco ip phone 7821 firmware
- cisco ip phone 7832 firmware
- cisco ip phone 7841 firmware
- cisco ip phone 7861 firmware
- cisco ip phone 8800 firmware
- cisco ip phone 8811 firmware
- cisco ip phone 8821-ex firmware
- cisco ip phone 8821 firmware
- cisco ip phone 8831 firmware
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- cisco ip phone 8832 firmware
- cisco ip phone 8841 firmware
- cisco ip phone 8845 firmware
- cisco ip phone 8851 firmware
- cisco ip phone 8861 firmware
- cisco ip phone 8865 firmware
- cisco ip phones 8832 firmware
- cisco unified ip phone 8851nr firmware
- cisco unified ip phone 8865nr firmware
- cisco wireless ip phone 8821-ex firmware
- cisco wireless ip phone 8821 firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-20018 is a high vulnerability (CVSS 8.6) in Cisco Session Initiation Protocol (sip) Software, published January 19, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. No source names a fixed version.