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Vulnerability record · CVE-2021-31987 · published 5 October 2021

CVE-2021-31987: Axis os vulnerability

Axis · Axis Os

A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.

7.5 CVSS 3.1 High EPSS 0.89% · top 42.1% CWE-1286 · CWE-1286
7.5CVSS 3.1 base score, v2 5.1
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.axis.com/files/tech_notes/CVE-2021-31987.pdf Vendor Advisory
https://www.axis.com/files/tech_notes/CVE-2021-31987.pdf Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-1185Axis os incorrect permission assignment vulnerabilityA configuration file on the local file system had improper input validation which could allow code execution and potentially lead to privilege escala…EPSS 0.23%8.8CVE-2025-11142Axis os os command injection vulnerabilityThe VAPIX API mediaclip.cgi that did not have a sufficient input validation allowing for a possible remote code execution. This flaw can only be expl…EPSS 0.52%8.8CVE-2025-0324Axis os vulnerabilityThe VAPIX Device Configuration framework allowed a privilege escalation, enabling a lower-privileged user to gain administrator privileges.EPSS 0.40%8.8CVE-2025-0358Axis os improper privilege management vulnerabilityDuring an annual penetration test conducted on behalf of Axis Communication, Truesec discovered a flaw in the VAPIX Device Configuration framework th…EPSS 0.25%8.8CVE-2023-5800Axis os code injection vulnerabilityVintage, member of the AXIS OS Bug Bounty Program, has found that the VAPIX API create_overlay.cgi did not have a sufficient input validation allowin…EPSS 0.68%8.8CVE-2021-31988Axis os injection vulnerabilityA user controlled parameter related to SMTP test functionality is not correctly validated making it possible to add the Carriage Return and Line Feed…EPSS 0.95%8.1CVE-2023-21415Axis os path traversal vulnerabilitySandro Poppi, member of the AXIS OS Bug Bounty Program, has found that the VAPIX API overlay_del.cgi is vulnerable to path traversal attacks that all…EPSS 0.59%7.8CVE-2025-0360Axis os incorrect authorization vulnerabilityDuring an annual penetration test conducted on behalf of Axis Communication, Truesec discovered a flaw in the VAPIX Device Configuration framework th…EPSS 0.14%

Source: NIST National Vulnerability Database (record CVE-2021-31987), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.