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CVE-2016-6883

30
FAUCET Score

CVE-2016-6883 describes a Bleichenbacher variant attack affecting MatrixSSL versions prior to 3.8.3 when configured with RSA Cipher Suites, allowing remote attackers to obtain sensitive information. This vulnerability has a CVSSv3 score of 5.9 (Medium), indicating a network-based attack with high attack complexity and high confidentiality impact. While not listed in CISA's KEV catalog, a Metasploit module exists for scanning this Bleichenbacher oracle, though there is no evidence of active exploitation, significant community discussion, or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.8.2CPE matchmatch criteria
cpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
13.91%
Probability of exploitation in next 30 days
EPSS Percentile
96.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Scanner for Bleichenbacher Oracle in RSA PKCS #1 v1.5 · Jun 17, 2009
This CVE's current EPSS score of 0.1391 is in the 96th percentile among its peer group of 19,955 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / matrixssl/matrixssl/blob/master/CHANGES.md
PatchRelease Notes
openwall.com / lists/oss-security/2016/08/19/8
Mailing List
securityfocus.com / bid/91488