CVE-2015-6418

What it is

The random-number generator on Cisco Small Business RV routers 4.x and SA500 security appliances 2.2.07 does not have sufficient entropy, which makes it easier for remote attackers to determine a TLS key pair via unspecified computations upon handshake key-exchange data, aka Bug ID CSCus15224.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

1.8% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2015-12-13 03:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 00:30 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.8% in the next 30 days (EPSS).
• Severity: 4.3 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2015-12-13 03:59 UTC

Last modified

2026-06-17 00:30 UTC

Exploit probability

1.8% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• Cisco sa520 2.2.07
• Cisco sa520w 2.2.07
• Cisco sa540 2.2.07
• Cisco rv016 multi-wan Vpn Firmware 4.0.0.7
• Cisco rv016 multi-wan Vpn Firmware 4.0.2.8
• Cisco rv016 multi-wan Vpn Firmware 4.0.5.0
• Cisco rv042 Dual Wan Vpn Router Firmware 4.0.2.8
• Cisco rv042g Dual Gigabit Wan Vpn Firmware 4.0.0.7

Attack profile CVSS 2.0 · 4.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2015-6418.md and follow it. Check whether this project is affected by CVE-2015-6418. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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