CVE-2023-49786

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 5.3%, top 8% 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
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 5.9Exploit: Elevated riskExposed: 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
5.9(medium)
EG Risk
58(Attend)
EG Risk 58/100SSVC: Attend

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
Severity59% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

December 14, 2023

Last Modified

June 17, 2026

References (14)

Affected Packages

(12 across 12 ecosystems)
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
asterisk—18.20.2-r0—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
asterisk—18.20.2-r0—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
asterisk—18.20.2-r0—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
asterisk—20.5.1-r0—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
asterisk1:16.10.0~dfsg-1 ... 1:16.28.0~dfsg-0+deb10u3 (22 versions)1:16.28.0~dfsg-0+deb10u4—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
asterisk1:16.16.1~dfsg+~2.10-1 ... 1:16.28.0~dfsg-0+deb11u3 (15 versions)1:16.28.0~dfsg-0+deb11u4—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
asterisk0.1.11-3 ... 1:20.5.0~dfsg+~cs6.13.40431414-1 (268 versions)1:20.5.1~dfsg+~cs6.13.40431414-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 161 total refreshes for this CVE.

  1. 2026-09-18 19:26 UTCEPSS rescore
  2. 2026-09-17 19:25 UTCEPSS rescore
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  10. 2026-08-16 23:56 UTCOSV refresh
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  30. 2026-08-01 18:06 UTCOSV refresh
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  43. 2026-07-23 02:28 UTCEG score recompute
  44. 2026-07-22 23:15 UTCEG score recompute▼ 1.60
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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 5% probability of exploitation in the next 30 days, which ranks it in the top 7.8% of all scored CVEs.
What is the CVSS score of CVE-2023-49786?
CVE-2023-49786 has a CVSS v3 base score of 5.9 (NVD).
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.

Dependency Blast Radius

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