01 Record

CVE-2021-36193

Multiple stack-based buffer overflows in the command line interpreter of FortiWeb before 6.4.2 may allow an authenticated attacker to achieve arbitrary code execution via specially crafted commands.

MediumPUBLISHEDCNA: fortinet

CNA base score6.3 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C

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02 Description

Multiple stack-based buffer overflows in the command line interpreter of FortiWeb before 6.4.2 may allow an authenticated attacker to achieve arbitrary code execution via specially crafted commands.

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 56.6% of scored records. A rank, not a probability.

NVD base score

7.2 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2022-02-02 11:19Z4 YR AGO

Last updated

2026-01-13 16:32Z9 MO AGO

Reserved

2021-07-06

Assigning CNA

fortinet

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C

Weaknesses

CWE-121Stack-based Buffer OverflowVariant
CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

f6b9f319ed5501bcaca813ea7923eff71f07219e86daa6600c66d14dfe6eed4d

05 Affected products

VendorProductVersionsPlatforms

FortinetFortiFone3.0.0 to 3.0.11—

FortinetFortiADC7.0.0, 6.2.0 to 6.2.2, 6.1.0 to 6.1.6, 6.0.0 to 6.0.4, 5.4.0 to 5.4.5, 5.3.0 to 5.3.7, 5.2.0 to 5.2.8, 5.1.0 to 5.1.7, 5.0.0 to 5.0.4—

FortinetFortiMail7.0.0 to 7.0.2, 6.4.0 to 6.4.6, 6.2.0 to 6.2.8, 6.0.0 to 6.0.12, 5.4.0 to 5.4.12—

FortinetFortiDDoS5.7.0, 5.6.0 to 5.6.1, 5.5.0 to 5.5.1, 5.4.0 to 5.4.3, 5.3.0 to 5.3.2, 5.2.0, 5.1.0, 5.0.0, 4.7.0, 4.6.0, 4.5.0, 4.4.0 to 4.4.2—

FortinetFortiDDoS-F6.3.0, 6.2.0 to 6.2.2, 6.1.0 to 6.1.4—

FortinetFortiVoice6.4.0 to 6.4.4, 6.0.0 to 6.0.10—

FortinetFortiDDoS-CM5.5.0 to 5.5.1, 5.4.0 to 5.4.3, 5.3.0 to 5.3.1, 5.2.0, 5.1.0, 5.0.0, 4.7.0—

FortinetFortiWeb6.4.0 to 6.4.1, 6.3.0 to 6.3.15—

FortinetFortiRecorder6.4.0 to 6.4.2, 6.0.0 to 6.0.10, 2.7.0 to 2.7.7, 2.6.0 to 2.6.3—

FortinetFortiNDR1.5.0 to 1.5.3, 1.4.0, 1.3.0 to 1.3.1, 1.2.0, 1.1.0—

06 References

fortiguard.comhttps://fortiguard.com/advisory/FG-IR-21-132

07 Remediation

Please upgrade to FortiFone version 3.0.12 or above Please upgrade to FortiWeb version 7.0.0 or above Please upgrade to FortiWeb version 6.4.2 or above Please upgrade to FortiWeb version 6.3.17 or above Please upgrade to FortiWeb version 6.3.16 or above Please upgrade to FortiWeb version 6.2.7 or above Please upgrade to FortiRecorder version 7.0.0 or above Please upgrade to FortiRecorder version 6.4.3 or above Please upgrade to FortiRecorder version 6.0.11 or above Please upgrade to FortiVoiceEnterprise version 6.4.5 or above Please upgrade to FortiVoiceEnterprise version 6.0.11 or above Please upgrade to FortiMail version 7.2.0 or above Please upgrade to FortiMail version 7.0.3 or above Please upgrade to FortiMail version 6.4.7 or above Please upgrade to FortiMail version 6.2.9 or above Please upgrade to FortiDDoS-F version 6.3.1 or above Please upgrade to FortiDDoS-F version 6.2.3 or above Please upgrade to FortiDDoS-F version 6.1.5 or above Please upgrade to FortiADC version 7.0.1 or above Please upgrade to FortiADC version 6.2.3 or above Please upgrade to FortiADC version 6.1.7 or above Please upgrade to FortiNDR version 7.0.0 or above Please upgrade to FortiDDoS version 5.7.1 or above Please upgrade to FortiDDoS version 5.6.2 or above Please upgrade to FortiDDoS version 5.5.2 or above Please upgrade to FortiDDoS version 5.4.3 or above Please upgrade to FortiDDoS version 5.3.2 or above Please upgrade to FortiDDoS-CM version 5.7.1 or above Please upgrade to FortiDDoS-CM