BR-6208AC: Use of Default Credentials
CVE-2026-1972 is a high-severity use of default credentials vulnerability in BR-6208AC from Edimax, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected BR-6208AC versions: 2_1.02. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.66% chance of exploitation within 30 days, higher than 52% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of BR-6208AC you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Edimax | BR-6208AC | 2_1.02 | Not stated |
| Edimax | Br-6208ac Firmware | 1.02 and earlier | 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
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 5.5 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 5.3 | Medium | CNA (vuldb.com) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | CNA (vuldb.com) |
Official description
A vulnerability was found in Edimax BR-6208AC 2_1.02. The affected element is the function auth_check_userpass2. Performing a manipulation of the argument Username/Password results in use of default credentials. The attack may be initiated remotely. The exploit has been made public and could be used. The vendor confirms that the affected product is end-of-life. They confirm that they "will issue a consolidated Security Advisory on our official support website." This vulnerability only affects products that are no longer supported by the maintainer.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Default Credentials
The product uses default credentials (such as passwords or cryptographic keys) for potentially critical functionality.
How developers prevent this class of flaw
- Prohibit use of default, hard-coded, or other values that do not vary for each installation of the product - especially for separate organizations.
- Force the administrator to change the credential upon installation.
- The product administrator could change the defaults upon installation or during operation.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/?id.344494Third Party Advisory, VDB Entry
- vuldb.com/?submit.744032Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- tzh00203.notion.site/EDIMAX-BR-6208AC-V2_1-02-Weak-Password-Authentication-Vulnerability-in-auth_check_userpa…Exploit, Third Party Advisory
Other references
- vuldb.com/?ctiid.344494Permissions Required, VDB Entry
Other vulnerabilities in BR-6208AC
- 10.0 Critical severity
- 10.0 Critical severity
- 10.0 Critical severity
- 8.3 High severity
- 9.9 Critical severity
- 9.9 Critical severity
Recent Use of Default Credentials vulnerabilities
- 8.1 High severity
- 8.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.3 Critical severity
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