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CVE-2015-7686

21
FAUCET Score

CVE-2015-7686 describes an algorithmic complexity vulnerability in the Email-Address Perl module (versions 1.908 and earlier), specifically within its Address.pm component. This flaw allows remote attackers to trigger a denial-of-service condition by consuming excessive CPU resources. The vulnerability is exploited by crafting a string of email addresses that includes nested comments using parenthesis characters. With a CVSS score of 7.8 (High), this vulnerability is easily exploitable over the network without authentication, leading to a complete denial of service. While the default configuration in version 1.908 mitigates the issue, it may still misparse certain legitimate comments. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating a low level of public awareness or concern.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.908CPE matchmatch criteria
cpe:2.3:a:email-address_project:email-address:*:*:*:*:*:perl:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.07%
Probability of exploitation in next 30 days
EPSS Percentile
86.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0307 is in the 75th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: perl-Email-Address

Vendor Advisories (1)

redhatCVE-2015-7686Moderate

perl-Email-Address: denial of service when parsing crafted email address list

Sep 27, 2015

References

forum.bestpractical.com / t/security-vulnerabilities-in-rt-2017-06-15/32016
openwall.com / lists/oss-security/2015/09/27/1
openwall.com / lists/oss-security/2015/10/02/13