CyberSecBulletin
CVE-2025-45985NVD status: Analyzed

Bl-wr9000 Firmware: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2025-45985 is a critical-severity improper neutralization of special elements used in a command vulnerability in Bl-wr9000 Firmware from B-link, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Bl-wr9000 Firmware versions: 2.4.9. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 6.79% chance of exploitation within 30 days, which is in the top 5.9% of all scored CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of Bl-wr9000 Firmware you run against the affected versions below, and install the vendor's latest release.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
B-linkBl-wr9000 Firmware2.4.9Not stated
B-linkBl-ac2100 Az3 Firmware1.0.4Not stated
B-linkBl-x10 Ac8 Firmware1.0.5Not stated
B-linkBl-lte300 Firmware1.2.3Not stated
B-linkBl-f1200 At1 Firmware1.0.0Not stated
B-linkBl-x26 Ac8 Firmware1.2.8Not stated
B-linkBlac450m Ae4 Firmware4.0.0Not stated
B-linkBl-x26 Da3 Firmware1.2.7Not stated

Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).

Official description

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 a command injection vulnerability via the bs_SetSSIDHide function.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Bl-wr9000 Firmware

All Bl-wr9000 Firmware vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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