CVE-2021-1301CWE-119

Cisco SD-WAN Buffer Overflow Vulnerabilities

Critical · published January 20, 2021

CVSS v3.0
9.8
EPSS
2%
Percentile
81.8
In the wild
Unconfirmed
What it is

🚨 An unauthenticated remote attacker can unleash chaos on Cisco SD-WAN devices! 🔥 Think of this vulnerability as a hotel with a broken security system, allowing anyone to waltz in without checking in — no ID required. It's a recipe for disaster if someone decides to take advantage of those open doors! An attacker could exploit these vulnerabilities to execute malicious commands on the device, leading to potential data breaches or complete device takeover. The implications could be absolutely devastating, especially if sensitive information is involved or if the entire network is compromised!

Put simply

Think of this vulnerability as a hotel with a broken security system, allowing anyone to waltz in without checking in — no ID required. It's a recipe for disaster if someone decides to take advantage of those open doors! Cisco SD-WAN products are vulnerable due to multiple flaws that allow attackers to bypass authentication and execute arbitrary code remotely. This means an attacker could manipulate the device without needing any credentials, which is just plain scary!

What to do

An attacker could exploit these vulnerabilities to execute malicious commands on the device, leading to potential data breaches or complete device takeover. The implications could be absolutely devastating, especially if sensitive information is involved or if the entire network is compromised! Immediately apply the latest patches released by Cisco to secure your devices. Additionally, implement strict network segmentation and monitoring to detect any unusual activity. Staying vigilant is key! You've got this! Follow these steps and you'll bolster your defenses in no time! 🛡️

The record
Technical detail
CVSS v3.0
9.8 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02130 · 81.8th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2021-01-20T19:55Z
EPSS history
Timeline
  • 20 JAN 19:55Z
    Cisco SD-WAN Buffer Overflow Vulnerabilities
    cvelistv5