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CVE

CVE-2021-24018

A buffer underwrite vulnerability in the firmware verification routine of FortiOS before 7.0.1 may allow an attacker loc

A buffer underwrite vulnerability in the firmware verification routine of FortiOS before 7.0.1 may allow an attacker located in the adjacent network to potentially execute arbitrary code via a specifically crafted firmware image.

MEDIUM · CVSS 4.3 EPSS 0.0012
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

3
fortinet fortios< 6.2.10
fortinet fortios>= 6.4.0 and < 6.4.7
fortinet fortiosall versions
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · psirt@fortinet.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 NVD04 Aug 2021 · 03:15 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://fortiguard.com/advisory/FG-IR-21-046Vendor Advisory
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