Security readout for executives and security teams
Plain-English summary
LB-LINK X-PRO firmware 1.0.22-20231206 contains built-in credentials for its easycwmp remote-management component. An attacker who can reach the affected service may gain substantial control without possessing unique device credentials. The published severity is critical, although exploitation is described as difficult.
Executive priority
Treat as an urgent containment and inventory issue, especially for internet-accessible or remotely managed devices. Because public exploit material exists and no confirmed vendor fix is cited, prioritize exposure reduction and consider replacement where isolation is impractical.
Technical view
Hard-coded credentials are present in /etc/config/easycwmp, associated with TR-069 remote management. The issue is remotely reachable, requires no privileges or user interaction, and may compromise confidentiality, integrity, and availability. CVSS 4.0 rates it 9.2, with high attack complexity.
Likely exposure
Exposure is limited by the available evidence to LB-LINK X-PRO version 1.0.22-20231206. Risk is greatest where easycwmp remote management is enabled and reachable from untrusted networks. The bundle does not establish whether other firmware versions or models are affected.
Exploitation context
Public exploit information is available, increasing practical risk. However, the attack is reportedly complex and difficult. The CVE is not listed as CISA KEV in the supplied bundle, and no cited source establishes active exploitation in the wild.
Researcher notes
The assessment relies on third-party reporting and a public disclosure rather than a responsive vendor advisory. Product naming varies between X-PRO and B-Link AC1200 X-PRO in the supplied references. Scope should therefore remain confined to the stated firmware until independently confirmed.
Mitigation direction
- Identify and prioritize all X-PRO devices running firmware 1.0.22-20231206.
- Disable easycwmp or restrict remote-management access to trusted management networks.
- Check LB-LINK guidance for corrected firmware; no confirmed patch is named in the sources.
- Replace or isolate affected devices if no vendor-supported remediation is available.
- Rotate related management credentials after containment and investigate suspected unauthorized access.
Validation and detection
- Verify device models and exact firmware versions against asset and configuration records.
- Securely inspect affected devices for hard-coded credentials in the easycwmp configuration.
- Confirm easycwmp is disabled or unreachable from untrusted networks.
- Review remote-management logs for unusual access, configuration changes, or unexpected endpoints.
- After remediation, confirm the vulnerable firmware or exposed service is no longer present.
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-259: 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 lookupCWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCVE-2026-19901 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
- 9.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
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
4 official scoresWe 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:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P——VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R2.25.9VulDBCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R2.25.9VulDBAV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR4.910VulDBVulnerability scoring details
Base CVSS 4.0 score
9.2CriticalVector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
7.6HighVector: AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- 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
- VDB-390091 | LB-LINK X-PRO easycwmp hard-coded credentialsCVE reference, VulDB · vdb-entry
- VDB-390091 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-19901 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #870763 | LB-LINK（深圳必联电子） B-Link AC1200 X-PRO(AC6)_Dual_V1.0.22-20231206-upgrade.bin Hardcoded CredentialsCVE reference, VulDB · third-party-advisory
- https://github.com/DavCloudz/cve/blob/main/B-Link/Hardcoded%20TR-069%20(easycwmp)%20Remote%20Management%20Credentials.mdCVE reference, VulDB · exploit
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.
Use of Hard-coded Password
Use of Hard-coded Password represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.