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Servers and applications

CVE-2015-2323

FortiOS 5.0.x before 5.0.12 and 5.2.x before 5.2.4 supports anonymous, export, RC4, and possibly other weak ciphers when using TLS to connect to FortiGuard servers, which allows man-in-the-middle attackers to spoof TLS content by modifying packets.

Severity
Medium 6.4
Published
11 Aug 2015
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.5% in the next 30 daysHigher than 73% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
Fortinet FortiOSServers and applications · cpe:o:fortinet:fortios
  • Version 5.2.3
  • Version 5.2.2
  • Version 5.2.1
  • Version 5.2.0
All 16 release lines
  • Version 5.0.0
  • Version 5.0.1
  • Version 5.0.2
  • Version 5.0.3
  • Version 5.0.4
  • Version 5.0.5
  • Version 5.0.6
  • Version 5.0.7
  • Version 5.0.8
  • Version 5.0.9
  • Version 5.0.10
  • Version 5.0.11
  • Version 5.2.0
  • Version 5.2.1
  • Version 5.2.2
  • Version 5.2.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2015-2323
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2015-2323