CVE-2015-5726

CVE-2015-5726 is a high-severity vulnerability in Botan Project Botan with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 1% (68th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Botan Project Botan
• Published: 2016-05-13
• Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.

How severe is CVE-2015-5726?

CVE-2015-5726 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2015-5726 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5726?

CVE-2015-5726 primarily affects Botan Project Botan. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-5726?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-5726 published?

CVE-2015-5726 was published on 2016-05-13 and last updated on 2026-06-17.

References

• http://botan.randombit.net/security.html
• http://www.debian.org/security/2016/dsa-3565

Affected products (30)

• cpe:2.3:a:botan_project:botan:1.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.2:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.3:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.4:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.5:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.6:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.7:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.8:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.10.9:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.0:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.1:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.2:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.3:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.4:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.5:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.6:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.7:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.8:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.9:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.10:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.11:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.12:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.13:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.14:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.15:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.16:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.17:*:*:*:*:*:*:*
• cpe:2.3:a:botan_project:botan:1.11.18:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

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