CVE intelligence and bounded remediation

CVE-2020-29380 — Vsolcn V1600D Firmware security vulnerability

Medium CVSS 5.9

An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. TELNET is offered by default but SSH is not always available. An attacker can intercept passwords sent in cleartext and conduct a man-in-the-middle attack on the management of the appliance.

Severity
Medium
CVSS
5.9 (3.1)
Published
2020-11-29
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-319, CWE-522

Affected products

  • vsolcn / v1600d_firmware / 2.03.57
  • vsolcn / v1600d_firmware / 2.03.69
  • vsolcn / v1600d4l_firmware / 1.01.49
  • vsolcn / v1600d-mini_firmware / 1.01.48
  • vsolcn / v1600g1_firmware / 1.9.7
  • vsolcn / v1600g1_firmware / 2.0.7

Showing 6 representative product identities from 7 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Cryptography, certificate, signature, and channel validation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Inventory affected algorithms, key uses, trust stores, certificate validation settings, random sources, and plaintext channels across clients and services.
  • Determine which secrets, identities, signatures, or data protections depend on the affected primitive or validation path.
  • Check debug, compatibility, fallback, and hostname or audience override settings in build and runtime configuration.

Remediate safely

  • Use a maintained platform cryptographic API with approved algorithms, modes, parameters, randomness, and full peer identity validation.
  • Remove insecure fallback and validation bypasses; separate keys by purpose and load them from managed secret storage.
  • Plan rotation or reissuance for affected keys, certificates, tokens, hashes, or ciphertext and document compatibility sequencing.

Authoritative sources

Complete CVE record and remediation plan

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