What is CVE-2015-5726?

CVE-2015-5726 is a high-severity vulnerability in Botan Project, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-05-13.

How severe is CVE-2015-5726?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2015-5726 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Botan Project

CVE-2015-5726

The BER decoder in Botan 0.10.x before 1.10.10 and 1.11.x before 1.11.19 allows remote attackers to cause a denial of service (application crash) via an empty BIT STRING in ASN.1 data.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2016-05-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Botan Project — versions 1.10.0, 1.10.1, 1.10.2
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

mrash/afl-cve

References

www.debian.org/security/2016/dsa-3565 (vendor-advisory)
botan.randombit.net/security.html (Vendor Advisory)

Frequently asked questions

What is CVE-2015-5726?: CVE-2015-5726 is a high-severity vulnerability in Botan Project, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2016-05-13.
How severe is CVE-2015-5726?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2015-5726 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.