Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2015-7826

29
FAUCET Score

CVE-2015-7826 describes an improper wildcard matching vulnerability in Botan 1.11.x before 1.11.22, affecting the botan_project. This critical vulnerability (CVSS 9.8) allows remote attackers to potentially have a significant impact on confidentiality, integrity, and availability by using a valid X.509 certificate to bypass hostname validation, as demonstrated by *.example.com matching bar.foo.example.com. While there is no known active exploitation or publicly available exploit code (Metasploit, Nuclei, ExploitDB), the CVE has garnered substantial community discussion with 10 mentions, indicating awareness despite a lack of media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.11.21CPE matchmatch criteria
cpe:2.3:a:botan_project:botan:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 48th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

botan.randombit.net / security.html
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party AdvisoryVDB Entry