CVE-2021-31987
A user controlled parameter related to SMTP test functionality is not correctly validated making...
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
- Record
CVE-2021-31987- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 5.1 Medium
AV:N/AC:H/Au:N/C:P/I:P/A:P - Weakness
- CWE-1286
- Updated
- 2026-11-02
CVE List No score
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
- Record
CVE-2021-31987- Weakness
- CWE-1286
- Updated
- 2026-11-02
EUVDEUVD-2021-18859 No score
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
- Record
EUVD-2021-18859- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xpwh-c6wc-qg9f
A user controlled parameter related to SMTP test functionality is not correctly validated making...
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
- Record
GHSA-xpwh-c6wc-qg9f- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-20, CWE-1286
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-31987 is a high vulnerability (CVSS 7.5) in Axis Os, published October 5, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.89%, the 59th percentile. No source names a fixed version.