Security readout for executives and security teams
Plain-English summary
LB-link AC450M routers running firmware V4.0.0 may allow an unauthenticated network attacker to execute operating-system commands. Successful exploitation could expose router data, alter configuration, disrupt connectivity, or enable broader network compromise. The supplied sources do not identify a vendor patch.
Executive priority
Prioritize immediate identification and network isolation of affected routers. The potential impact is full device compromise without authentication, but active exploitation is not established. Require owners to document exposure, remediation status, and any decision to replace unsupported equipment.
Technical view
The reported flaw is insufficient input validation in bs_SetLimitCli_info within libshare.so. Attacker-controlled input can reach a system-command execution context, enabling arbitrary command execution. CVSS 3.1 rates it 9.8: network-accessible, low complexity, no privileges or user interaction, with high confidentiality, integrity, and availability impact. The record lists CWE-20.
Likely exposure
Exposure is most concerning where the affected AC450M functionality is reachable from untrusted networks. Inventory confidence is limited because the narrative names LB-link AC450M V4.0.0, while the structured affected-product fields are recorded as unavailable. Other models or versions should not be assumed vulnerable.
Exploitation context
A public technical reference exists, but the supplied bundle says this CVE is not in CISA KEV and provides no evidence of active exploitation. Treat exploitation status as unconfirmed. The network-accessible, unauthenticated attack conditions nevertheless justify urgent exposure reduction.
Researcher notes
The source narrative identifies LB-link AC450M V4.0.0 and bs_SetLimitCli_info in libshare.so, but structured affected fields contain no usable vendor, product, version, or CPE data. No patch information is supplied. Avoid extending impact to other firmware or models without vendor confirmation or additional evidence.
Mitigation direction
- Identify and isolate LB-link AC450M devices running firmware V4.0.0.
- Prevent untrusted networks from reaching affected router interfaces or services.
- Disable unnecessary remote access and restrict administration to trusted management networks.
- Check LB-link guidance for confirmed firmware updates or vendor-approved mitigations.
- Replace affected devices if no supported remediation becomes available.
Validation and detection
- Verify device model and installed firmware through trusted inventory or local administration.
- Confirm whether affected interfaces are reachable from the internet or other untrusted networks.
- Review available router and network telemetry for unexplained command execution or configuration changes.
- After remediation, confirm remote access restrictions and firmware state from a trusted network.
- Continue monitoring the CVE and vendor guidance for updated affected-version or exploitation information.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-35869 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Orcust-Automaton/Vulnerability/blob/main/LB-Link/AC450M/bs_SetLimitCli_info.mdCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.