CVE-2021-26906

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.55% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 83.6% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-02-18 19:50Z5 YR AGO

Last updated

2024-08-03 20:33Z2 YR AGO

Reserved

2021-02-08

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass

Data version

5.1

Document digest

db0054d1b8e715a6221f405e80dfe59a43458298a036c8437bf7b19551a0138e

• downloads.asterisk.orghttps://downloads.asterisk.org/pub/security/x_refsource_MISC
• seclists.org20210218 AST-2021-005: Remote Crash Vulnerability in PJSIP channel driverhttp://seclists.org/fulldisclosure/2021/Feb/61mailing-listx_refsource_FULLDISC
• downloads.asterisk.orghttps://downloads.asterisk.org/pub/security/AST-2021-005.htmlx_refsource_CONFIRM
• issues.asterisk.orghttps://issues.asterisk.org/jira/browse/ASTERISK-29196x_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/161477/Asterisk-Project-Security-Advisory-AST-2021-005.htmlx_refsource_MISC