CVE-2023-20018Network attack vector

Authentication bypass via insufficient request validation

Published Jan 19, 2023 · Updated Aug 2, 2024

Authentication bypass in Cisco IP Phone 7800 and 8800 Series SIP Software allows remote attackers to access restricted web pages. The web-based management interface insufficiently validates user-supplied input in a crafted request before authorizing access to protected portions of the interface. The interface must be enabled and network-reachable; no credentials or user interaction are required, and access is limited to otherwise protected web-interface areas.

CVSS severity8.6
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Cisco IP Phone 7800 and 8800 Series SIP Software allows remote attackers to access restricted web pages. The web-based management interface insufficiently validates user-supplied input in a crafted request before authorizing access to protected portions of the interface. The interface must be enabled and network-reachable; no credentials or user interaction are required, and access is limited to otherwise protected web-interface areas.

The record

CVE
CVE-2023-20018
Published
Jan 19, 2023
Updated
Aug 2, 2024
Vendor
ClamAV
Product
Cisco Session Initiation Protocol (SIP) Software
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.1(1.9)
  2. Affected versionversion=10.1(1)SR1
  3. Affected versionversion=10.1(1)SR2
  4. Affected versionversion=10.2(1)
  5. Affected versionversion=10.2(1)SR1
  6. Affected versionversion=10.2(2)
  7. Affected versionversion=10.3(1)
  8. Affected versionversion=10.3(1.11) 3rd Party
  9. Affected versionversion=10.3(1.9) 3rd Party
  10. Affected versionversion=10.3(1)SR1
  11. Affected versionversion=10.3(1)SR2
  12. Affected versionversion=10.3(1)SR3
  13. Affected versionversion=10.3(1)SR4
  14. Affected versionversion=10.3(1)SR4b
  15. Affected versionversion=10.3(1)SR5
  16. Affected versionversion=10.3(1)SR6
  17. Affected versionversion=10.3(1)SR7
  18. Affected versionversion=10.3(2)
  19. Affected versionversion=10.4(1) 3rd Party
  20. Affected versionversion=10.4(1)SR2 3rd Party
  21. Affected versionversion=11.0(0.7) MPP
  22. Affected versionversion=11.0(1)
  23. Affected versionversion=11.0(1) MPP
  24. Affected versionversion=11-0-1MSR1-1
  25. Affected versionversion=11.0(2)
  26. Affected versionversion=11.0(2)SR1
  27. Affected versionversion=11.0(2)SR2
  28. Affected versionversion=11.0(3)
  29. Affected versionversion=11.0(3)SR1
  30. Affected versionversion=11.0(3)SR2
  31. Affected versionversion=11.0(3)SR3
  32. Affected versionversion=11.0(3)SR4
  33. Affected versionversion=11.0(3)SR5
  34. Affected versionversion=11.0(3)SR6
  35. Affected versionversion=11.0(4)
  36. Affected versionversion=11.0(4)SR1
  37. Affected versionversion=11.0(4)SR2
  38. Affected versionversion=11.0(4)SR3
  39. Affected versionversion=11.0(5)
  40. Affected versionversion=11.0(5)SR1
  41. Affected versionversion=11.0(5)SR2
  42. Affected versionversion=11.0(5)SR3
  43. Affected versionversion=11.0(6)
  44. Affected versionversion=11.0(6)SR1
  45. Affected versionversion=11.0(6)SR2
  46. Affected versionversion=11.5(1)
  47. Affected versionversion=11.5(1)SR1
  48. Affected versionversion=11.7(1)
  49. Affected versionversion=12.0(1)
  50. Affected versionversion=12.0(1)SR1
  51. Affected versionversion=12.0(1)SR2
  52. Affected versionversion=12.0(1)SR3
  53. Affected versionversion=12.1(1)
  54. Affected versionversion=12.1(1)SR1
  55. Affected versionversion=12.5(1)
  56. Affected versionversion=12.5(1)SR1
  57. Affected versionversion=12.5(1)SR2
  58. Affected versionversion=12.5(1)SR3
  59. Affected versionversion=12.6(1)
  60. Affected versionversion=12.6(1)SR1
  61. Affected versionversion=12.7(1)
  62. Affected versionversion=12.7(1)SR1
  63. Affected versionversion=12.8(1)
  64. Affected versionversion=12.8(1)SR1
  65. Affected versionversion=12.8(1)SR2
  66. Affected versionversion=14.0(1)
  67. Affected versionversion=14.0(1)SR1
  68. Affected versionversion=14.0(1)SR2
  69. Affected versionversion=14.0(1)SR3
  70. Affected versionversion=14.1(1)
  71. Affected versionversion=14.1(1)SR1
  72. Affected versionversion=9.3(4) 3rd Party
  73. Affected versionversion=9.3(4)SR1 3rd Party
  74. Affected versionversion=9.3(4)SR2 3rd Party
  75. Affected versionversion=9.3(4)SR3 3rd Party

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Session Initiation Protocol (SIP) Softwareversion=10.1(1.9); version=10.1(1)SR1; version=10.1(1)SR2; version=10.2(1); version=10.2(1)SR1; version=10.2(2); version=10.3(1); version=10.3(1.11) 3rd Party; version=10.3(1.9) 3rd Party; version=10.3(1)SR1; version=10.3(1)SR2; version=10.3(1)SR3; version=10.3(1)SR4; version=10.3(1)SR4b; version=10.3(1)SR5; version=10.3(1)SR6; version=10.3(1)SR7; version=10.3(2); version=10.4(1) 3rd Party; version=10.4(1)SR2 3rd Party; version=11.0(0.7) MPP; version=11.0(1); version=11.0(1) MPP; version=11-0-1MSR1-1; version=11.0(2); version=11.0(2)SR1; version=11.0(2)SR2; version=11.0(3); version=11.0(3)SR1; version=11.0(3)SR2; version=11.0(3)SR3; version=11.0(3)SR4; version=11.0(3)SR5; version=11.0(3)SR6; version=11.0(4); version=11.0(4)SR1; version=11.0(4)SR2; version=11.0(4)SR3; version=11.0(5); version=11.0(5)SR1; version=11.0(5)SR2; version=11.0(5)SR3; version=11.0(6); version=11.0(6)SR1; version=11.0(6)SR2; version=11.5(1); version=11.5(1)SR1; version=11.7(1); version=12.0(1); version=12.0(1)SR1; version=12.0(1)SR2; version=12.0(1)SR3; version=12.1(1); version=12.1(1)SR1; version=12.5(1); version=12.5(1)SR1; version=12.5(1)SR2; version=12.5(1)SR3; version=12.6(1); version=12.6(1)SR1; version=12.7(1); version=12.7(1)SR1; version=12.8(1); version=12.8(1)SR1; version=12.8(1)SR2; version=14.0(1); version=14.0(1)SR1; version=14.0(1)SR2; version=14.0(1)SR3; version=14.1(1); version=14.1(1)SR1; version=9.3(4) 3rd Party; version=9.3(4)SR1 3rd Party; version=9.3(4)SR2 3rd Party; version=9.3(4)SR3 3rd Party

Published CVSS scores

8.6CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:X/RL:X/RC:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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