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CVE-2021-43072

MEDIUM
6.7
CVSS Score
Published: July 18, 2023 at 12:01 AM UTC
Updated: June 17, 2026 at 04:10 AM UTC
4 products affected across 1 vendorFortiOSFortiProxyFortiManager

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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

A buffer copy without checking size of input ('classic buffer overflow') in Fortinet FortiAnalyzer version 7.0.2 and below, version 6.4.7 and below, version 6.2.9 and below, version 6.0.11 and below, version 5.6.11 and below, FortiManager version 7.0.2 and below, version 6.4.7 and below, version 6.2.9 and below, version 6.0.11 and below, version 5.6.11 and below, FortiOS version 7.0.0 through 7.0.4, 6.4.0 through 6.4.8, 6.2.0 through 6.2.10, 6.0.x and FortiProxy version 7.0.0 through 7.0.3, 2.0.0 through 2.0.8, 1.2.x, 1.1.x and 1.0.x allows attacker to execute unauthorized code or commands via crafted CLI `execute restore image` and `execute certificate remote` operations with the tFTP protocol.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiAnalyzer· Fortinet
95%
5.6.0 ≤ v ≤ 5.6.115.6.0 ≤ v < 6.4.86.0.0 ≤ v ≤ 6.0.126.2.0 ≤ v ≤ 6.2.126.4.0 ≤ v ≤ 6.4.77.0.0 ≤ v ≤ 7.0.27.0.0 ≤ v < 7.0.35.6.05.6.15.6.105.6.115.6.25.6.35.6.45.6.55.6.65.6.75.6.85.6.96.0.06.0.16.0.106.0.116.0.126.0.26.0.36.0.46.0.56.0.66.0.76.0.86.0.96.2.06.2.16.2.106.2.116.2.126.2.26.2.36.2.46.2.56.2.66.2.76.2.86.2.96.4.06.4.16.4.26.4.36.4.46.4.56.4.66.4.77.0.07.0.17.0.2
Affected range stops below 6.4.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.3, so it looks safe — our inference, not a vendor statement
FortiManager· Fortinet
95%
5.6.0 ≤ v ≤ 5.6.115.6.0 ≤ v < 6.4.86.0.0 ≤ v ≤ 6.0.126.2.0 ≤ v ≤ 6.2.126.4.0 ≤ v ≤ 6.4.77.0.0 ≤ v ≤ 7.0.27.0.0 ≤ v < 7.0.35.6.05.6.15.6.105.6.115.6.25.6.35.6.45.6.55.6.65.6.75.6.85.6.96.0.06.0.16.0.106.0.116.0.126.0.26.0.36.0.46.0.56.0.66.0.76.0.86.0.96.2.06.2.16.2.106.2.116.2.126.2.26.2.36.2.46.2.56.2.66.2.76.2.86.2.96.4.06.4.16.4.26.4.36.4.46.4.56.4.66.4.77.0.07.0.17.0.2
Affected range stops below 6.4.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.3, so it looks safe — our inference, not a vendor statement
FortiOS· Fortinet
95%
6.0.0 ≤ v < 6.2.116.4.0 ≤ v < 6.4.97.0.0 ≤ v < 7.0.6
Affected range stops below 6.2.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.6, so it looks safe — our inference, not a vendor statement
FortiProxy· Fortinet
95%
1.0.0 ≤ v < 2.0.97.0.0 ≤ v < 7.0.4
Affected range stops below 2.0.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Not Applicable
Source: [email protected]
https://fortiguard.com/advisory/FG-IR-21-206
Vendor Advisory
Source: [email protected]
https://www.fortiguard.com/psirt/FG-IR-21-206

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.7MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120

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