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NVD description
A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: "Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC doesn't exist for SSH implementation, but rather it's against the internal API."
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
CVE-2026-3706 A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manip… https://www.cve.org/CVERecord?id=CVE-2026-3706
Post summary
The text announces the discovery of CVE-2026-3706 in Dropbear, specifying the impacted function and file, but contains no PoC, exploit, patch, or active attack details.
CVE-2026-3706 Cryptographic Signature Verification Vulnerability in mkj Dropbear... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-3706 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4
Post summary
The tweet announces CVE‑2026‑3706 as a cryptographic signature verification issue in mkj Dropbear, linking to vulnerability details, but does not mention PoC, exploits, patches, or active exploitation.
🚨 CVE-2026-3706: Dropbear SSH ≤2025.89 skips a critical check on Ed25519 signatures, so crafted signatures are still accepted remotely, undermining integrity and auditing. Grab the latest patch ASAP! Full advisory ➡️ https://volerion.com/vulnerabilities/CVE-2026-3706 #Dropbear #SSH #infosec
Post summary
CVE-2026-3706 enables remote acceptance of forged Ed25519 signatures in Dropbear SSH up to 2025.89, and an urgent patch is available.