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CVE-2016-7406

32
FAUCET Score

CVE-2016-7406 is a critical format string vulnerability affecting Dropbear SSH versions prior to 2016.74, allowing remote attackers to execute arbitrary code. This vulnerability can be triggered by injecting format string specifiers into either the username or host argument during an SSH connection attempt. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2016.73CPE matchmatch criteria
cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*

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
10.49%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.1049 is in the 91st percentile among its peer group of 36,829 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

Patch Available

Vendor Patches (1)

gentoopatch availablevia nvd_reference
View patch

References

seclists.org / fulldisclosure/2024/Aug/35
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
secure.ucc.asn.au / hg/dropbear/rev/b66a483f3dcb
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201702-23
PatchThird Party AdvisoryVDB Entry
openwall.com / lists/oss-security/2016/09/15/2
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/92974
Third Party AdvisoryVDB Entry