CVE-2023-49786

MEDIUMNVD 5.97.5▲
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 5%CVSS: 5.9Exploit: NoneExposed: 0

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

Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.

CVSS v3
5.9
EG Score
7.5(medium)
EPSS
91.8%
KEV
Not listed

Published

December 14, 2023

Last Modified

June 17, 2026

References (14)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 44× 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.

  1. 2026-07-22 14:06 UTCEPSS rescore
  2. 2026-07-21 15:23 UTCEPSS rescore
  3. 2026-07-21 15:23 UTCEPSS rescore
  4. 2026-07-20 17:06 UTCEPSS rescore
  5. 2026-07-19 14:29 UTCEPSS rescore
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  7. 2026-07-19 02:27 UTCEPSS rescore
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  10. 2026-07-16 17:01 UTCEPSS rescore
  11. 2026-07-15 16:56 UTCEPSS rescore
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  13. 2026-07-15 01:59 UTCEPSS rescore
  14. 2026-07-15 01:59 UTCEPSS rescore
  15. 2026-07-15 00:55 UTCOSV refresh
  16. 2026-07-13 22:28 UTCEPSS rescore
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  18. 2026-07-12 05:45 UTCEPSS rescore
  19. 2026-07-11 08:26 UTCEPSS rescore
  20. 2026-07-09 19:08 UTCEPSS rescore
  21. 2026-07-08 15:13 UTCEPSS rescore
  22. 2026-07-06 16:26 UTCEPSS rescore
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  1. 2026-07-04 06:29 UTCEPSS rescore
  2. 2026-07-04 06:29 UTCEPSS rescore
  3. 2026-07-02 16:59 UTCEPSS rescore
  4. 2026-07-01 15:05 UTCEPSS rescore
  5. 2026-06-30 23:21 UTCEPSS rescore
  6. 2026-06-30 23:21 UTCEPSS rescore
  7. 2026-06-29 14:05 UTCEPSS rescore
  8. 2026-06-28 14:06 UTCEPSS rescore
  9. 2026-06-28 14:06 UTCEPSS rescore
  10. 2026-06-28 04:55 UTCEPSS rescore
  11. 2026-06-27 03:07 UTCEPSS rescore
  12. 2026-06-27 01:39 UTCOSV refresh
  13. 2026-06-25 13:48 UTCEPSS rescore
  14. 2026-06-25 13:48 UTCEPSS rescore
  15. 2026-06-24 14:04 UTCEPSS rescore
  16. 2026-06-24 14:04 UTCEPSS rescore
  17. 2026-06-24 06:34 UTCNVD updateCVSS v3 → 5.9 · severity → MEDIUM
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-23 21:31 UTCEPSS rescore
  20. 2026-06-22 14:24 UTCEPSS rescore
  21. 2026-06-22 14:24 UTCEPSS rescore
  22. 2026-06-21 01:58 UTCEPSS rescore
  23. 2026-06-21 01:58 UTCEPSS rescore
  24. 2026-06-19 19:24 UTCEPSS rescore
  25. 2026-06-19 19:24 UTCEPSS rescore
  26. 2026-06-18 17:51 UTCEPSS rescore
  27. 2026-06-17 17:51 UTCEPSS rescore
  28. 2026-06-16 17:51 UTCEPSS rescore
  29. 2026-06-16 17:51 UTCEPSS rescore
  30. 2026-06-15 17:47 UTCEPSS rescore
  31. 2026-06-14 23:16 UTCEPSS rescore
  32. 2026-06-13 22:59 UTCEPSS rescore
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  34. 2026-06-12 23:11 UTCEPSS rescore
  35. 2026-06-12 23:10 UTCEPSS rescore
  36. 2026-06-11 13:59 UTCEPSS rescore
  37. 2026-06-10 22:17 UTCEPSS rescore
  38. 2026-06-10 13:21 UTCEPSS rescore
  39. 2026-06-09 12:13 UTCOSV refresh
  40. 2026-06-08 14:16 UTCEPSS rescore
  41. 2026-06-08 14:16 UTCEPSS rescore
  42. 2026-06-07 15:24 UTCEPSS rescore
  43. 2026-06-07 15:23 UTCEPSS rescore
  44. 2026-06-06 13:46 UTCEPSS rescore
  45. 2026-06-06 13:46 UTCEPSS rescore
  46. 2026-06-05 22:46 UTCEPSS rescore
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  48. 2026-06-05 06:09 UTCEPSS rescore
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  51. 2026-06-04 13:11 UTCEPSS rescore
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  56. 2026-06-01 13:51 UTCEPSS rescore
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  58. 2026-05-29 13:43 UTCEPSS rescore
  59. 2026-05-28 13:44 UTCEPSS rescore
  60. 2026-05-27 13:39 UTCEPSS rescore
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  62. 2026-05-26 13:43 UTCEPSS rescore
  63. 2026-05-26 13:43 UTCEPSS rescore
  64. 2026-05-26 07:18 UTCEPSS rescore
  65. 2026-05-26 07:18 UTCEPSS rescore
  66. 2026-05-26 07:18 UTCEPSS rescore
  67. 2026-05-24 12:04 UTCEG score recompute

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Frequently asked(5)

What is CVE-2023-49786?
CVE-2023-49786 is a medium vulnerability published on December 14, 2023. Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when…
When was CVE-2023-49786 disclosed?
CVE-2023-49786 was first published in the National Vulnerability Database on December 14, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-49786 actively exploited?
CVE-2023-49786 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-49786?
CVE-2023-49786 has a CVSS v3 base score of 5.9 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.
How do I remediate CVE-2023-49786?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49786, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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