Authentication bypass in Cisco Session Initiation Protocol Software
Priority LOW 38CWE-288Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-288.
Summary
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.
Why it matters now
EPSS 0.0063 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Session Initiation Protocol (SIP) Software | 9.3(4) 3rd Party; 9.3(4)SR3 3rd Party; 9.3(4)SR1 3rd Party; 9.3(4)SR2 3rd Party; 11.0(3)SR3; 11.0(2)SR1; 11.5(1); 11.0(5)SR2; 11.0(2); 11.7(1); 11.0(4)SR3; 11.0(0.7) MPP; 11.0(4)SR2; 11.0(3)SR5; 11.0(3)SR6; 11.0(3); 11.0(4)SR1; 11.0(1) MPP; 11.0(4); 11.0(3)SR4; 11.0(5); 11.0(3)SR1; 11.0(5)SR1; 11.0(3)SR2; 11.0(2)SR2; 11.0(1); 11.5(1)SR1; 11-0-1MSR1-1; 10.4(1) 3rd Party; 10.3(1.11) 3rd Party; 10.2(2); 10.2(1)SR1; 10.1(1.9); 10.1(1)SR2; 10.2(1); 10.1(1)SR1; 10.4(1)SR2 3rd Party; 10.3(1); 10.3(1)SR4b; 10.3(1)SR5; 10.3(1.9) 3rd Party; 10.3(2); 10.3(1)SR4; 10.3(1)SR2; 10.3(1)SR3; 10.3(1)SR1; 12.6(1); 12.1(1); 12.5(1)SR1; 12.5(1)SR2; 12.5(1); 12.5(1)SR3; 12.6(1)SR1; 12.7(1); 12.1(1)SR1; 12.0(1); 12.0(1)SR2; 12.0(1)SR1; 12.0(1)SR3; 12.8(1); 12.8(1)SR1; 12.8(1)SR2; 11.0(5)SR3; 11.0(6); 11.0(6)SR1; 11.0(6)SR2; 10.3(1)SR6; 10.3(1)SR7; 12.7(1)SR1; 14.0(1)SR1; 14.0(1); 14.0(1)SR2; 14.0(1)SR3; 14.1(1); 14.1(1)SR1 | — | No fix listed | CNA |
- Cisco Session Initiation Protocol (SIP) Software VendorCisco Affected 9.3(4) 3rd Party; 9.3(4)SR3 3rd Party; 9.3(4)SR1 3rd Party; 9.3(4)SR2 3rd Party; 11.0(3)SR3; 11.0(2)SR1; 11.5(1); 11.0(5)SR2; 11.0(2); 11.7(1); 11.0(4)SR3; 11.0(0.7) MPP; 11.0(4)SR2; 11.0(3)SR5; 11.0(3)SR6; 11.0(3); 11.0(4)SR1; 11.0(1) MPP; 11.0(4); 11.0(3)SR4; 11.0(5); 11.0(3)SR1; 11.0(5)SR1; 11.0(3)SR2; 11.0(2)SR2; 11.0(1); 11.5(1)SR1; 11-0-1MSR1-1; 10.4(1) 3rd Party; 10.3(1.11) 3rd Party; 10.2(2); 10.2(1)SR1; 10.1(1.9); 10.1(1)SR2; 10.2(1); 10.1(1)SR1; 10.4(1)SR2 3rd Party; 10.3(1); 10.3(1)SR4b; 10.3(1)SR5; 10.3(1.9) 3rd Party; 10.3(2); 10.3(1)SR4; 10.3(1)SR2; 10.3(1)SR3; 10.3(1)SR1; 12.6(1); 12.1(1); 12.5(1)SR1; 12.5(1)SR2; 12.5(1); 12.5(1)SR3; 12.6(1)SR1; 12.7(1); 12.1(1)SR1; 12.0(1); 12.0(1)SR2; 12.0(1)SR1; 12.0(1)SR3; 12.8(1); 12.8(1)SR1; 12.8(1)SR2; 11.0(5)SR3; 11.0(6); 11.0(6)SR1; 11.0(6)SR2; 10.3(1)SR6; 10.3(1)SR7; 12.7(1)SR1; 14.0(1)SR1; 14.0(1); 14.0(1)SR2; 14.0(1)SR3; 14.1(1); 14.1(1)SR1 Fixed in — No fix listed CNA
CPE configurations NVD · 44
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_7800_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7832_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7832:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_7800_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7811_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7811:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7821_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7832_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_7841_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Show 34 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8800:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8821_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8821-ex:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8831_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8831:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8832_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8832:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:ip_phones_8832_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ip_phones_8832:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:unified_ip_phone_8851nr_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:unified_ip_phone_8851nr:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:unified_ip_phone_8865nr_firmware:*:*:*:*:*:*:*:* | before 14.1\(1\)sr2 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:unified_ip_phone_8865nr:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:wireless_ip_phone_8821_firmware:*:*:*:*:*:*:*:* | before 11.0\(6\)sr4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:wireless_ip_phone_8821:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
| cpe:2.3:o:cisco:wireless_ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* | before 11.0\(6\)sr4 | Vulnerable | Cisco |
| cpe:2.3:h:cisco:wireless_ip_phone_8821-ex:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Cisco |
- cpe:2.3:o:cisco:ip_phone_7861_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_7861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8800_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8800:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8811_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8811:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8821_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8821-ex:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8831_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8831:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8832_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8841_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8841:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8845_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8845:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8851_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8851:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8861_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8861:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phone_8865_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phone_8865:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:ip_phones_8832_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:ip_phones_8832:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:unified_ip_phone_8851nr_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:unified_ip_phone_8851nr:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:unified_ip_phone_8865nr_firmware:*:*:*:*:*:*:*:* Versions before 14.1\(1\)sr2 Vulnerable ·Cisco
- cpe:2.3:h:cisco:unified_ip_phone_8865nr:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:wireless_ip_phone_8821_firmware:*:*:*:*:*:*:*:* Versions before 11.0\(6\)sr4 Vulnerable ·Cisco
- cpe:2.3:h:cisco:wireless_ip_phone_8821:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
- cpe:2.3:o:cisco:wireless_ip_phone_8821-ex_firmware:*:*:*:*:*:*:*:* Versions before 11.0\(6\)sr4 Vulnerable ·Cisco
- cpe:2.3:h:cisco:wireless_ip_phone_8821-ex:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20018
- 2026-10-03 Alias added: GHSA-jc6w-v2gh-gqx3
- 2026-10-30 EPSS moved to the 50th–90th percentile
References
Advisory 1
More Cisco Ip Phone 7800 Firmware vulnerabilities
- TI-2018-00284 Improper input validation in Cisco IP Phone 7800 Series and 8800 Series CVSS 3.0HIGH 7.5
- TI-2019-01310 Resource management flaw in Cisco IP Phone 8800 Series Software CVSS 3.1MEDIUM 6.5
Sources
- CVE-2023-20018 · CVE Program
- CVE-2023-20018 · NVD
- FIRST EPSS
- GHSA-jc6w-v2gh-gqx3 · GitHub Advisory Database · CC BY 4.0
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