CVE-2021-32558

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

9.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 95.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/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

2021-07-27 05:19Z5 YR AGO

Last updated

2024-08-03 23:25Z2 YR AGO

Reserved

2021-05-11

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class

Data version

5.1

Document digest

9c5dd250f975b840556ed900256be25c85d7708b9f099b93e3a405e1e7ac5d99

• seclists.org20210722 AST-2021-008: Remote crash when using IAX2 channel driverhttp://seclists.org/fulldisclosure/2021/Jul/49mailing-listx_refsource_FULLDISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/163639/Asterisk-Project-Security-Advisory-AST-2021-008.htmlx_refsource_MISC
• downloads.asterisk.orghttps://downloads.asterisk.org/pub/security/AST-2021-008.htmlx_refsource_MISC
• issues.asterisk.orghttps://issues.asterisk.org/jira/browse/ASTERISK-29392x_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210804 [SECURITY] [DLA 2729-1] asterisk security updatehttps://lists.debian.org/debian-lts-announce/2021/08/msg00005.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-4999https://www.debian.org/security/2021/dsa-4999vendor-advisoryx_refsource_DEBIAN