Security readout for executives and security teams
Plain-English summary
Certain ASUS routers may trust the wrong server and fail to verify downloaded content properly. A network-positioned attacker could make the router download and run arbitrary commands through a spoofed server. This is critical because compromise can affect the router itself and traffic passing through it.
Executive priority
Treat this as urgent for any business using ASUS routers in the listed firmware series. Prioritize internet-edge and branch routers first, because router compromise can affect connectivity, traffic security, and downstream systems.
Technical view
CVE-2026-13385 combines improper certificate validation and improper integrity check validation in affected ASUS router firmware series. The CVSS 4.0 score is 9.5. The disclosed attack condition is remote MITM with a spoofed server causing command download and execution. Exact model and fixed-version details are not included in the provided bundle.
Likely exposure
Exposure is limited to certain ASUS router models running 3.0.0.4_386, 3.0.0.4_388, or 3.0.0.6_102 firmware series. Organizations with ASUS routers should inventory firmware series and check the ASUS advisory for model-specific status.
Exploitation context
The bundle does not show CISA KEV listing or other cited evidence of active exploitation. The described scenario requires a remote man-in-the-middle position and a spoofed server, but no exploit steps or public weaponization evidence are provided.
Researcher notes
Evidence supports a high-impact MITM update-trust failure mapped to CWE-295 and CWE-354. The provided data does not include affected model names, patched build numbers, proof-of-concept status, or exploitation telemetry, so validation should stay anchored to ASUS advisory updates.
Mitigation direction
- Review the ASUS security advisory for affected models and firmware guidance.
- Update affected ASUS router firmware according to vendor instructions.
- Inventory ASUS routers running the listed firmware series.
- Limit router update and management exposure to trusted network paths where feasible.
- Monitor ASUS advisory updates for model-specific fixes or mitigations.
Validation and detection
- Identify ASUS router models and current firmware versions.
- Compare firmware series against 3.0.0.4_386, 3.0.0.4_388, and 3.0.0.6_102.
- Check whether each device appears in ASUS security update guidance.
- Confirm updated firmware versions after maintenance.
- Document devices that remain unresolved pending vendor guidance.
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-295: 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-354: 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 lookupCVE-2026-13385 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
- 9.5 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——ASUSVulnerability scoring details
Base CVSS 4.0 score
9.5CriticalVector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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://www.asus.com/security-advisory/CVE reference, ASUS
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.
Improper Certificate Validation
Improper Certificate Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Validation of Integrity Check Value
Improper Validation of Integrity Check Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.