Home/CVE/User controlled parameters related to SMTP notifications are not correctly validated. This can lead to a buffer overflow
CVE

CVE-2021-31986

User controlled parameters related to SMTP notifications are not correctly validated. This can lead to a buffer overflow

User controlled parameters related to SMTP notifications are not correctly validated. This can lead to a buffer overflow resulting in crashes and data leakage.

MEDIUM · CVSS 6.8 EPSS 0.0058
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

4
axis os< 10.7
axis os 2016< 6.50.5.5
axis os 2018< 8.40.4.3
axis os 2020< 9.80.3.5
◈

Detection Rules (IDS/IPS)

1
et-openET INFO Suspicious POST to Axis OS (smtptest.cgi)bad-unknown
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · product-security@axis.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Oct 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.axis.com/files/tech_notes/CVE-2021-31986.pdfVendor Advisory
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