CVE-2014-8016 — The Cisco IronPort Email Security Appliance (ESA) allows remote attackers to cause a denial of service (CPU consumption) via long Subject headers in e-mail messages, aka Bug ID CSCzv93864

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MEDIUM

The Cisco IronPort Email Security Appliance (ESA) allows remote attackers to cause a denial of service (CPU consumption) via long Subject headers in e-mail messages, aka Bug ID CSCzv93864

Published Dec 19, 2014

5.0

MEDIUM

CVSS 2.0

EPSS 1.23%

Description

The Cisco IronPort Email Security Appliance (ESA) allows remote attackers to cause a denial of service (CPU consumption) via long Subject headers in e-mail messages, aka Bug ID CSCzv93864.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.23% 0.01232

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01232

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.23% (0.01232)	67.88th	v5 (v2026.06.15)
Jun 15, 2026	1.23% (0.01232)	64.96th	v5 (v2026.06.15)
Mar 17, 2025	0.45% (0.00445)	61.32th	v4 (v2025.03.14)
Dec 12, 2024	0.19% (0.00187)	57.37th	v3 (v2023.03.01)
Jul 2, 2024	0.19% (0.00187)	56.31th	v3 (v2023.03.01)
Mar 7, 2023	0.19% (0.00187)	54.31th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-399

References (1)

http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-8016
vendor-advisoryx_refsource_CISCOVendor Advisory

Link	Providers	Tags
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-8016		vendor-advisoryx_refsource_CISCOVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Dec 19, 2014

Updated Aug 6, 2024

Reserved Oct 8, 2014

Link CVE-2014-8016

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2014-8016

Red Hat

Severity n/a

Public date n/a

Links CVE-2014-8016