A Stack-based Buffer Overflow vulnerability in the HTTPD daemon of FortiOS 6.0.10 and below, 6.2.2 and below and FortiProxy 1.0.x, 1.1.x, 1.2.9 and below, 2.0.0 and below may allow an authenticated remote attacker to crash the service by sending a malformed PUT request to the server
Published Apr 12, 2021
6.5
MEDIUMCVSS 3.1
EPSS 1.57%
Description
A Stack-based Buffer Overflow vulnerability in the HTTPD daemon of FortiOS 6.0.10 and below, 6.2.2 and below and FortiProxy 1.0.x, 1.1.x, 1.2.9 and below, 2.0.0 and below may allow an authenticated remote attacker to crash the service by sending a malformed PUT request to the server. Fortinet is not aware of any successful exploitation of this vulnerability that would lead to code execution.
Affected products
-
- Version FortiProxy 1.0.x, 1.1.x, 1.2.9 and below, 2.0.0 and below; FortiOS 6.0.10 and below, 6.2.2 and belowStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Fortinet | Fortinet FortiProxy, FortiOS | n/a |
|
- ≥ 1.0.0 · < 1.2.10
- ≥ 2.0.0 · < 2.0.2
- ≤ 6.0.10
- ≥ 6.2.0 · ≤ 6.2.2
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:S/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Oct 23, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.57% (0.01566) | 74.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.57% (0.01566) | 71.99th | v5 (v2026.06.15) |
| Nov 21, 2025 | 2.80% (0.02796) | 85.59th | v4 (v2025.03.14) |
| Nov 18, 2025 | 3.82% (0.03818) | 86.98th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.33% (0.02325) | 83.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.60% (0.04596) | 81.69th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.33% (0.02325) | 83.69th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00144) | 51.74th | v3 (v2023.03.01) |
| Jun 19, 2024 | 0.14% (0.00144) | 50.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.14% (0.00143) | 48.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.98% (0.01978) | 79.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.98% (0.01978) | 56.34th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.37% (0.01374) | 32.00th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.37% (0.01374) | 0.00th | v1 |
References (2)
- https://fortiguard.com/advisory/FG-IR-19-248 x_refsource_CONFIRMVendor Advisory
- https://fortiguard.com/advisory/FG-IR-21-007 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://fortiguard.com/advisory/FG-IR-19-248 | x_refsource_CONFIRMVendor Advisory | |
| https://fortiguard.com/advisory/FG-IR-21-007 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.