CVE-2024-20375

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2024-08-21. NVD baseline CVSS 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.6EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.6Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper parsing of SIP messages. An attacker could exploit this vulnerability by sending a crafted SIP message to an affected Cisco Unified CM or Cisco Unified CM SME device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition that interrupts the communications of reliant voice and video devices.

CVSS v3
8.6
EG Score
8.6HIGHmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.7%
EPSS %ILE
53rd
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 21, 2024

Last Modified

August 1, 2025

Advisory Details (1)

Auto-updated Sep 1, 2026
No fix on record yet.
generic

Cisco Unified Communications Manager Denial of Service Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-dos-kkHq43We

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 173 total refreshes for this CVE.

  1. 2026-10-09 20:05 UTCEPSS rescore
  2. 2026-10-08 17:07 UTCEPSS rescore
  3. 2026-10-07 23:46 UTCEPSS rescore
  4. 2026-10-06 15:15 UTCEPSS rescore
  5. 2026-10-05 17:41 UTCEPSS rescore
  6. 2026-10-03 14:23 UTCEPSS rescore
  7. 2026-10-01 19:48 UTCEPSS rescore
  8. 2026-09-30 16:50 UTCEG score recompute
  9. 2026-09-30 15:01 UTCEPSS rescore
  10. 2026-09-29 15:17 UTCEPSS rescore
  11. 2026-09-28 13:49 UTCEPSS rescore
  12. 2026-09-24 14:01 UTCEPSS rescore
  13. 2026-09-23 13:46 UTCEPSS rescore
  14. 2026-09-23 13:46 UTCEPSS rescore
  15. 2026-09-20 20:14 UTCEPSS rescore
  16. 2026-09-16 14:06 UTCEPSS rescore
  17. 2026-09-16 05:11 UTCEPSS rescore
  18. 2026-09-15 03:08 UTCEPSS rescore
  19. 2026-09-13 16:45 UTCEPSS rescore
  20. 2026-09-12 14:59 UTCEPSS rescore
  21. 2026-09-11 14:51 UTCEPSS rescore
  22. 2026-09-11 09:34 UTCEPSS rescore
  23. 2026-09-08 21:58 UTCEPSS rescore
  24. 2026-09-07 15:59 UTCEPSS rescore
  25. 2026-09-06 13:46 UTCEPSS rescore
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  1. 2026-09-05 15:26 UTCEPSS rescore
  2. 2026-09-04 13:58 UTCEPSS rescore
  3. 2026-09-04 05:05 UTCEPSS rescore
  4. 2026-09-02 14:10 UTCEPSS rescore
  5. 2026-09-01 13:52 UTCEPSS rescore
  6. 2026-08-30 19:15 UTCEPSS rescore
  7. 2026-08-30 01:20 UTCEPSS rescore
  8. 2026-08-28 21:39 UTCEPSS rescore
  9. 2026-08-27 14:23 UTCEPSS rescore
  10. 2026-08-26 14:44 UTCEPSS rescore
  11. 2026-08-25 13:47 UTCEPSS rescore
  12. 2026-08-23 00:17 UTCEPSS rescore
  13. 2026-08-21 23:47 UTCEPSS rescore
  14. 2026-08-20 22:53 UTCEPSS rescore
  15. 2026-08-19 17:02 UTCEPSS rescore
  16. 2026-08-18 13:46 UTCEPSS rescore
  17. 2026-08-17 13:45 UTCEPSS rescore
  18. 2026-08-16 14:54 UTCEPSS rescore
  19. 2026-08-16 14:54 UTCEPSS rescore
  20. 2026-08-16 02:12 UTCEPSS rescore
  21. 2026-08-15 01:28 UTCEPSS rescore
  22. 2026-08-13 21:58 UTCEPSS rescore
  23. 2026-08-12 13:49 UTCEPSS rescore
  24. 2026-08-11 13:40 UTCEPSS rescore
  25. 2026-08-09 13:45 UTCEPSS rescore
  26. 2026-08-08 16:35 UTCEPSS rescore
  27. 2026-08-06 13:45 UTCEPSS rescore
  28. 2026-08-05 19:15 UTCEPSS rescore
  29. 2026-08-04 15:08 UTCEPSS rescore
  30. 2026-08-04 10:36 UTCEPSS rescore
  31. 2026-08-03 10:34 UTCEPSS rescore
  32. 2026-08-02 02:25 UTCEPSS rescore
  33. 2026-08-02 02:25 UTCEPSS rescore
  34. 2026-08-01 04:14 UTCEPSS rescore
  35. 2026-07-30 16:26 UTCEPSS rescore
  36. 2026-07-30 01:29 UTCEPSS rescore
  37. 2026-07-28 15:34 UTCEPSS rescore
  38. 2026-07-27 14:11 UTCEPSS rescore
  39. 2026-07-26 14:53 UTCEPSS rescore
  40. 2026-07-25 14:16 UTCEPSS rescore
  41. 2026-07-24 14:16 UTCEPSS rescore
  42. 2026-07-23 14:17 UTCEPSS rescore
  43. 2026-07-23 14:17 UTCEPSS rescore
  44. 2026-07-23 02:33 UTCEG score recompute
  45. 2026-07-22 23:19 UTCEG score recompute
  46. 2026-07-22 14:07 UTCEPSS rescore
  47. 2026-07-21 15:23 UTCEPSS rescore
  48. 2026-07-21 15:23 UTCEPSS rescore
  49. 2026-07-20 17:06 UTCEPSS rescore
  50. 2026-07-19 14:30 UTCEPSS rescore
  51. 2026-07-19 14:30 UTCEPSS rescore
  52. 2026-07-19 02:28 UTCEPSS rescore
  53. 2026-07-19 02:28 UTCEPSS rescore
  54. 2026-07-18 10:03 UTCEPSS rescore
  55. 2026-07-18 10:03 UTCEPSS rescore
  56. 2026-07-15 16:56 UTCEPSS rescore
  57. 2026-07-15 16:56 UTCEPSS rescore
  58. 2026-07-15 01:59 UTCEPSS rescore
  59. 2026-07-15 01:59 UTCEPSS rescore
  60. 2026-07-13 22:28 UTCEPSS rescore
  61. 2026-07-13 06:11 UTCEPSS rescore
  62. 2026-07-13 06:11 UTCEPSS rescore
  63. 2026-07-12 05:45 UTCEPSS rescore
  64. 2026-07-11 08:26 UTCEPSS rescore
  65. 2026-07-09 19:09 UTCEPSS rescore
  66. 2026-07-09 19:09 UTCEPSS rescore
  67. 2026-07-08 15:13 UTCEPSS rescore
  68. 2026-07-07 13:45 UTCEPSS rescore
  69. 2026-07-07 13:45 UTCEPSS rescore
  70. 2026-07-06 16:26 UTCEPSS rescore
  71. 2026-07-06 02:22 UTCEPSS rescore
  72. 2026-07-06 02:22 UTCEPSS rescore
  73. 2026-07-05 02:29 UTCEPSS rescore
  74. 2026-07-04 06:30 UTCEPSS rescore
  75. 2026-07-01 15:05 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2024-20375?
CVE-2024-20375 is a high vulnerability published on August 21, 2024. A vulnerability in the SIP call processing function of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected…
When was CVE-2024-20375 disclosed?
CVE-2024-20375 was first published on August 21, 2024, with the most recent update on August 1, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-20375 actively exploited?
CVE-2024-20375 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-20375?
CVE-2024-20375 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2024-20375?
No fix for CVE-2024-20375 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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