The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authenticatio
ASUS GT-AC2900 before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 are named as affected. The checked facts list no fix.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The administrator web interface software on ASUS GT-AC2900 and Lyra Mini routers is affected by this flaw, which lets an unauthenticated remote user bypass login checks. An attacker could gain unauthorized administrative access to the router, potentially changing its settings.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of '\0' matches the device's default value of '\0' in some situations. Note: All versions of Lyra Mini and earlier which are unsupported (End-of-Life, EOL) are also affected by this vulnerability, Consumers can mitigate this vulnerability by disabling the remote access features from WAN.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 4
asus.com
GitHub · atredispartners/advisories
atredis.com
Questions about CVE-2021-32030
What does this mean?
The administrator application can wrongly treat a request as logged in when the submitted asus_token starts with a null byte and the User-Agent matches an internal service string. This grants access to the administrative web interface.Source: atredis.com
Am I affected, and how do I check?
The description names ASUS GT-AC2900 before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630. The bug also requires the device to lack a configured ifttt_token, which is its default state, so check the firmware version and whether an ifttt_token is set.Source: atredis.com
What should I do about it?
The checked facts do not name a fixed firmware version. The version numbers in the description are the thresholds to compare your firmware against.Source: atredis.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2025-06-02, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
The checked facts list no workaround. The bug depends on the default state with no ifttt_token configured, and no remedy for that state is given in the facts.Source: atredis.com