CVE-2026-3706

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 6.4% of scored records. A rank, not a probability.

NVD base score

1.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-08 05:02Z7 MO AGO

Last updated

2026-04-22 18:54Z6 MO AGO

Reserved

2026-03-07

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

Weaknesses

• CWE-345Insufficient Verification of Data AuthenticityClass
• CWE-347Improper Verification of Cryptographic SignatureBase

Data version

5.2

Document digest

57e9ba7754d3fef878858fc514051ed72f51ed9318de9b929b0c7d832862ff1b

• vuldb.comVDB-349652 | mkj Dropbear S Range Check curve25519.c unpackneg signature verificationhttps://vuldb.com/?id.349652vdb-entrytechnical-description
• vuldb.comVDB-349652 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.349652signaturepermissions-required
• vuldb.comSubmit #765933 | GitHub Dropbear 2025.89 Improper Verification of Cryptographic Signaturehttps://vuldb.com/?submit.765933third-party-advisory
• github.comhttps://github.com/mkj/dropbear/issues/406issue-tracking
• github.comhttps://github.com/mkj/dropbear/pull/407issue-trackingpatch
• github.comhttps://github.com/mkj/dropbear/commit/fdec3c90a15447bd538641d85e5a3e3ac981011dpatch
• github.comhttps://github.com/str4d/ed25519-java/issues/82#issue-727629226issue-tracking
• github.comhttps://github.com/mkj/dropbear/product