CVE intelligence and bounded remediation

CVE-2025-45987 — B-Link Bl-Wr9000 Firmware security vulnerability

Critical CVSS 9.8

Blink routers BL-WR9000 V2.4.9 , BL-AC2100_AZ3 V1.0.4, BL-X10_AC8 v1.0.5 , BL-LTE300 v1.2.3, BL-F1200_AT1 v1.0.0, BL-X26_AC8 v1.2.8, BLAC450M_AE4 v4.0.0 and BL-X26_DA3 v1.2.7 were discovered to contain multiple command injection vulnerabilities via the dns1 and dns2 parameters in the bs_SetDNSInfo function.

Severity
Critical
CVSS
9.8 (3.1)
Published
2025-06-13
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-77

Affected products

  • b-link / bl-wr9000_firmware / 2.4.9
  • b-link / bl-ac2100_az3_firmware / 1.0.4
  • b-link / bl-lte300_firmware / 1.2.3
  • b-link / bl-f1200_at1_firmware / 1.0.0
  • b-link / bl-x26_ac8_firmware / 1.2.8
  • b-link / blac450m_ae4_firmware / 4.0.0

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

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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