CVE-2021-31987
HIGHCVSS 7.5/10EPSS 0.86%
Last modified
CVE-2021-31987 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.. EPSS estimates a 0.86% chance of exploitation in the next 30 days.
Description
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Axis | Axis Os | < 10.8 |
| Axis | Axis Os 2016 | < 6.50.5.5 |
| Axis | Axis Os 2018 | < 8.40.4.3 |
| Axis | Axis Os 2020 | < 9.80.3.5 |
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
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-31987?
A user controlled parameter related to SMTP test functionality is not correctly validated making it possible to bypass blocked network recipients.
How severe is CVE-2021-31987?
CVE-2021-31987 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.
How do I fix CVE-2021-31987?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-31987?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST