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CVE-2016-7406: dropbear_ssh_project dropbear_ssh Improper Input Validation

Modified
AliasesUBUNTU-CVE-2016-7406DEBIAN-CVE-2016-7406
Published 03-03-2017Last modified 04-11-2025

Vulnerability summary

CVE-2016-7406 is a high (CVSS 10.0) Improper Input Validation vulnerability in dropbear_ssh_project dropbear_ssh. EPSS estimates a 10.22% chance of exploitation in the next 30 days, higher than 95.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 10% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
10.22%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-634-1MGASA-2016-0301

Timeline

  1. 03-03-2017
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

Format string vulnerability in Dropbear SSH before 2016.74 allows remote attackers to execute arbitrary code via format string specifiers in the (1) username or (2) host argument.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

10.22%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

No change 0.00 pp

From 10.22% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian1 product
  • dropbear< 2016.74-1
Dropbear_ssh_project1 product
Ubuntu1 product
  • dropbearAll versions (No fix recorded)

3 vendors · 3 products

References

10 links