What is CVE-2020-3343?

CVE-2020-3343 is a medium-severity vulnerability in Cisco Advanced Malware Protection For Endpoints, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2020-05-22.

How severe is CVE-2020-3343?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Cisco Advanced Malware Protection For Endpoints

CVE-2020-3343

A vulnerability in Cisco AMP for Endpoints Linux Connector Software and Cisco AMP for Endpoints Mac Connector Software could allow an authenticated, local attacker to cause a buffer overflow on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted packet to an affected device. A successful exploit could allow the attacker to cause the Cisco AMP for Endpoints service to crash and restart.

Vulnerability class: Buffer Overflow

Published 2020-05-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (25.4th percentile), scored 2026-10-21.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Weakness classification (CWE)

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-amp4elin… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2020-3343?: CVE-2020-3343 is a medium-severity vulnerability in Cisco Advanced Malware Protection For Endpoints, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2020-05-22.
How severe is CVE-2020-3343?: Medium severity. CVSS v3 base score is 5.5 out of 10.