Is CVE-2018-0272 being actively exploited?

CVE-2018-0272 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-0272?

CVE-2018-0272 has a CVSS 3.0 base score of 5.9 (MEDIUM).

CVE-2018-0272

MEDIUM · CVSS 5.9EPSS 1.3%EU EUVD

A vulnerability in the Secure Sockets Layer (SSL) Engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper error handling while processing SSL traffic. An attacker could exploit this vulnerability by sending a large volume of crafted SSL traffic to the vulnerable device. A successful exploit could allow the attacker to degrade the device performance by triggering a persistent high CPU utilization condition. Cisco Bug IDs: CSCvh89340.

Key facts

CVSS score: 5.9 (v3.0)
Severity: MEDIUM
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-399
EPSS score: 1.3% (69th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-1095)
Published: April 19, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-1095 in the EU Vulnerability Database. Last updated in EUVD on November 29, 2024.

View on the EU Vulnerability Database

Affected products

cisco / firepower
cisco / firepower

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Firepower Threat Defense on ASA Cryptographic Module - Cisco Systems, Inc. - FIPS 140 3315 - historical
Cisco Firepower Threat Defense on 4K/9K Cryptographic Module - Cisco Systems, Inc. - FIPS 140 3287 - historical
Cisco Firepower Cryptographic Module - Cisco Systems, Inc. - FIPS 140 3261 - historical

References

http://www.securityfocus.com/bid/103925(Third Party Advisory, VDB Entry)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-firepower(Mitigation, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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