CVE-2016-6891
MatrixSSL before 3.8.6 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted ASN.1 Bit Field primitive in an X.509 certificate.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
MatrixSSL before 3.8.6 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted ASN.1 Bit Field primitive in an X.509 certificate.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.86% probability · 79th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- matrixssl/matrixssl
- Source
- cve@mitre.org
EPSS 1.9% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/93498Third Party Advisory, VDB Entry
- http://www.tripwire.com/state-of-security/security-data-protection/cyber-security/flawed-matrixssl-code-highlights-need-for-better-iot-update-practices/Technical Description, Third Party Advisory
- https://github.com/matrixssl/matrixssl/blob/3-8-6-open/CHANGES.mdPatch, Release Notes, Third Party Advisory
- https://www.kb.cert.org/vuls/id/396440Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/93498Third Party Advisory, VDB Entry
- http://www.tripwire.com/state-of-security/security-data-protection/cyber-security/flawed-matrixssl-code-highlights-need-for-better-iot-update-practices/Technical Description, Third Party Advisory
- https://github.com/matrixssl/matrixssl/blob/3-8-6-open/CHANGES.mdPatch, Release Notes, Third Party Advisory
- https://www.kb.cert.org/vuls/id/396440Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.