CVE-2019-15703

HIGH
7.5
CVSS Score
Published: October 24, 2019 at 01:53 PM UTC
Updated: June 17, 2026 at 02:20 AM UTC
1 product affected across 1 vendorFortiOS

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1, 6.2.0, 6.0.8 and below for device not enable hardware TRNG token and models not support builtin TRNG seed allows attacker to theoretically recover the long term ECDSA secret in a TLS client with a RSA handshake and mutual ECDSA authentication via the help of flush+reload side channel attacks in FortiGate VM models only.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 5.6.9v ≤ 6.0.86.0.0 ≤ v < 6.0.96.2.0 ≤ v < 6.2.36.2.06.2.1
Affected range stops below 6.0.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-331

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