Use of a hardcoded cryptographic key in the FortiGuard services communication protocol may allow a Man in the middle with knowledge of the key to eavesdrop on and modify information (URL/SPAM services in FortiOS 5.6, and URL/SPAM/AV services in FortiOS 6.0.; URL rating in FortiClient) sent and received from Fortiguard severs by decrypting these messages
Published Nov 21, 2019
5.9
MEDIUMCVSS 3.1
EPSS 1.58%
Description
Use of a hardcoded cryptographic key in the FortiGuard services communication protocol may allow a Man in the middle with knowledge of the key to eavesdrop on and modify information (URL/SPAM services in FortiOS 5.6, and URL/SPAM/AV services in FortiOS 6.0.; URL rating in FortiClient) sent and received from Fortiguard severs by decrypting these messages. Affected products include FortiClient for Windows 6.0.6 and below, FortiOS 6.0.7 and below, FortiClient for Mac OS 6.2.1 and below.
Affected products
-
- Version FortiClient for Mac OS 6.2.1 and belowStatusaffectedConstraints-
- Version
-
- Version FortiClient for Windows 6.0.6 and belowStatusaffectedConstraints-
- Version
-
- Version FortiOS 6.0.7 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 | FortiClient for Mac OS | n/a |
| ||||||
| Fortinet | FortiClient for Windows | n/a |
| ||||||
| Fortinet | FortiOS | n/a |
|
- ≤ 6.0.6
- ≤ 6.2.1
- ≤ 6.0.6
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:H/PR:N/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:N/A:N
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 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.58% (0.01581) | 74.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.77% (0.01766) | 75.11th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.13% (0.00128) | 48.18th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.13% (0.00128) | 47.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00128) | 45.84th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v1 |
| Jan 6, 2022 | 0.42% (0.00416) | 9.79th | v1 |
| Sep 1, 2021 | 0.42% (0.00416) | 25.53th | v1 |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://fortiguard.com/advisory/FG-IR-18-100 x_refsource_CONFIRMThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://fortiguard.com/advisory/FG-IR-18-100 | x_refsource_CONFIRMThird Party Advisory |
Change history (0)
No recorded changes yet.