Router: Insertion of Sensitive Information into Log File
CVE-2026-16528 is a high-severity insertion of sensitive information into log file vulnerability in Router from ASUS, with a CVSS 4.0 base score of 8.4 out of 10. It can be exploited from the same local network by an attacker with administrator privileges, without any action from a user. Affected Router versions: 3.0.0.4.386 series; 3.0.0.4.388 series; 3.0.0.6.102 series. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.22% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Router you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on asus.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| ASUS | Router | 3.0.0.4.386 series; 3.0.0.4.388 series; 3.0.0.6.102 series | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Attack requirements
- NoneThe attack does not depend on a particular deployment or configuration.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Confidentiality (vulnerable system)
- HighSerious loss of confidentiality on the vulnerable system.
- Integrity (vulnerable system)
- HighSerious loss of integrity on the vulnerable system.
- Availability (vulnerable system)
- LowLimited loss of availability on the vulnerable system.
- Confidentiality (other systems)
- NoneNo loss of confidentiality on systems beyond the vulnerable one.
- Integrity (other systems)
- NoneNo loss of integrity on systems beyond the vulnerable one.
- Availability (other systems)
- NoneNo loss of availability on systems beyond the vulnerable one.
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA.
Official description
Insertion of Sensitive Information into Log File in certain ASUS router models allows a remote authenticated attacker to obtain DDNS credentials from the system log, potentially enabling modification of DNS settings.Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Insertion of Sensitive Information into Log File
The product writes sensitive information to a log file.
How developers prevent this class of flaw
- Consider seriously the sensitivity of the information written into log files. Do not write secrets into the log files.
- Remove debug log files before deploying the application into production.
- Protect log files against unauthorized read/write.
More Insertion of Sensitive Information into Log File vulnerabilities (CWE-532)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
References
Advisories
Other vulnerabilities in Router
- 8.7 High severity
- 8.6 High severity
- 7.7 High severity
- 8.2 High severity
- 9.3 Critical severity
- 7.7 High severity
Recent Insertion of Sensitive Information into Log File vulnerabilities
- 7.5 High severity
- 7.7 High severity
- 7.8 High severity
- 7.3 High severity
- 7.3 High severity
- 8.4 High severity
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