CVE-2021-43074 json
An improper verification of cryptographic signature vulnerability [CWE-347] in FortiWeb 6.4 all versions, 6.3.16 and below, 6.2 all version…
published 2023-02-16 3 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30027
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
An improper verification of cryptographic signature vulnerability [CWE-347] in FortiWeb 6.4 all versions, 6.3.16 and below, 6.2 all versions, 6.1 all versions, 6.0 all versions; FortiOS 7.0.3 and below, 6.4.8 and below, 6.2 all versions, 6.0 all versions; FortiSwitch 7.0.3 and below, 6.4.10 and below, 6.2 all versions, 6.0 all versions; FortiProxy 7.0.1 and below, 2.0.7 and below, 1.2 all versions, 1.1 all versions, 1.0 all versions may allow an attacker to decrypt portions of the administrative session management cookie if able to intercept the latter.
Patch / fix
- fortinet fortiproxy 2.0.8, 7.0.2
- fortinet fortiweb 6.3.17, 7.0.0
- fortinet fortios 6.4.9, 7.0.4
- fortinet fortiswitch 6.4.11, 7.0.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:U/RC:C |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected products
- Fortinet FortiSwitch
- Fortinet FortiWeb
- Fortinet FortiProxy
- Fortinet FortiOS
Classification
- Weakness
-
- CWE-347 Improper Verification of Cryptographic Signature
- Technology feeds
References
-
fortiguard.com
/psirt/FG-IR-21-126
vendor-advisory
Sources
- CVE List CVE-2021-43074
- NVD CVE-2021-43074
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