CVE-2021-31987
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.89% probability · 59th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-1286
- Affected
- axis/axis os · axis/axis os 2016 · axis/axis os 2018 · axis/axis os 2020
- Source
- product-security@axis.com
EPSS 0.9% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.axis.com/files/tech_notes/CVE-2021-31987.pdfVendor Advisory
- https://www.axis.com/files/tech_notes/CVE-2021-31987.pdfVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.