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NVD / CVE Program· CNA fortinet

CVE-2024-21762: A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.2, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.13…

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: Now (action score 94/100)

  • CISA has confirmed exploitation in the wild (Feb 9, 2024); it is known to be used in ransomware campaigns. Remediation deadline for US federal agencies: Feb 16, 2024.
  • Probability of exploitation in the next 30 days: 84.5% (FIRST EPSS); higher than 99.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.2, FortiOS 7.2.0 through 7.2.6, FortiOS 7.0.0 through 7.0.13, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiOS 6.0 all versions, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.14, FortiProxy 2.0.0 through 2.0.13, FortiProxy 01.02 all versions, FortiProxy 1.2 all versions, FortiProxy 01.01 all versions, FortiProxy 1.1 all versions, FortiProxy 01.00 all versions allows attacker to execute unauthorized code or commands via specifically crafted requests

Published
Feb 9, 2024
Updated
Oct 22, 2026
EPSS
84.5% · 99th percentile

Report tools

JSON

Action score

94

Now

Patch today or shut off access.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
25 / 30 · 84.5%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · fortinet
9.6
0.2 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Feb 9, 2024. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Feb 16, 2024.

Known to be used in ransomware campaigns.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-21762

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
fortinetfortiproxy
fortinetfortios

Versions reported by the vendor

Affected version ranges reported by the assigning authority (fortinet). Independent of NVD's CPE analysis and usually ahead of it.

  • Fortinet FortiOS

    • 7.4.0 and later · up to and including 7.4.2affected · semver
    • 7.2.0 and later · up to and including 7.2.6affected · semver
    • 7.0.0 and later · up to and including 7.0.13affected · semver
    • 6.4.0 and later · up to and including 6.4.14affected · semver
    • 6.2.0 and later · up to and including 6.2.15affected · semver
    • 6.0.0 and later · up to and including 6.0.18affected · semver

  • Fortinet FortiProxy

    • 01.02.00affected
    • 7.4.0 and later · up to and including 7.4.2affected · semver
    • 7.2.0 and later · up to and including 7.2.8affected · semver
    • 7.0.0 and later · up to and including 7.0.14affected · semver
    • 2.0.0 and later · up to and including 2.0.13affected · semver
    • 1.2.1 and later · up to and including 1.2.13affected · semver
    • 1.1.4 and later · up to and including 1.1.6affected · semver
    • 01.01.00 and later · up to and including 01.01.03affected · semver
    • 01.00.00 and later · up to and including 01.00.07affected · semver
Affected versions · NVD (10)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fortinet fortios7.4.0 and later · before 7.4.3
  • fortinet fortios6.2.0 and later · before 6.2.16
  • fortinet fortios6.4.0 and later · before 6.4.15
  • fortinet fortios7.0.0 and later · before 7.0.14
  • fortinet fortios7.2.0 and later · before 7.2.7
  • fortinet fortios6.0.0 and later · before 6.0.18
  • fortinet fortiproxy7.0.0 and later · before 7.0.15
  • fortinet fortiproxy7.2.0 and later · before 7.2.9
  • fortinet fortiproxy7.4.0 and later · before 7.4.3
  • fortinet fortiproxy1.0.0 and later · before 2.0.14

Same product

fortinet: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-40684An authentication bypass using an alternate path or channel [CWE-288] in Fortinet FortiOS version 7.2.0 through 7.2.1 and 7.0.0 through 7.0.KEV
    99Now
  • CVE-2018-13379An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 and…KEV
    99Now
  • CVE-2024-55591An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and…KEV
    97Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-47536Dec 13, 2023 · An improper access control vulnerability [CWE-284] in FortiOS version 7.2.0, version 7.0.13 and below, version 6.4.14 and below and…
    21Monitor
  • ← EarlierCVE-2023-44250Jan 10, 2024 · An improper privilege management vulnerability [CWE-269] in a Fortinet FortiOS HA cluster version 7.4.0 through 7.4.1 and 7.2.5 and in a…
    35Monitor
  • Later →CVE-2024-23113Feb 15, 2024 · A use of externally-controlled format string in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13…KEV
    88Now

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×13

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHub13 repositories2024-02-28 → 2026-10-20

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. CISA KEVsame day
  2. Published
  3. First PoC+19 d
  4. TodayNov 14, 2026+1009 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-4278932 days apartA out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12…
    40Plan
  • CVE-2023-22640282 days apartA out-of-bounds write vulnerability in Fortinet FortiOS 7.2.0 through 7.2.3, FortiOS 7.0.0 through 7.0.10, FortiOS 6.4.0 through 6.4.11…
    35Monitor
  • CVE-2023-22639241 days apartA out-of-bounds write in Fortinet FortiOS version 7.2.0 through 7.2.3, FortiOS version 7.0.0 through 7.0.10, FortiOS version 6.4.0 through…
    31Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records