Vulnerability Details : CVE-2021-26717

An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6. When re-negotiating for T.38, if the initial remote response was delayed just enough, Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream, then Asterisk would crash.
Published 2021-02-18 20:15:13
Updated 2021-02-24 17:34:00
Source MITRE
View at NVD,   CVE.org

Products affected by CVE-2021-26717

Threat overview for CVE-2021-26717

Top countries where our scanners detected CVE-2021-26717
Top open port discovered on systems with this issue 443
IPs affected by CVE-2021-26717 9,796
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-26717!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-26717

EPSS FAQ
0.19%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 56 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-26717

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
 NIST
7.5
 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.9
3.6
 NIST

References for CVE-2021-26717

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