Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Evidence dossier
CVE-2021-32030
CVE-2021-32030
78.7–99.4Priority evidence range
gen-56ccdaf9Normalized restatement
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.
- State
- PUBLISHED
- Published
- May 6, 2021
- Updated
- Oct 21, 2025
- Evidence coverage
- 72%
2026-07-18 · v2026.06.15 · percentile 99.9%
Distinct CVSS assessments remain side by side; none are averaged.
Source comparison
Who said what
mitreoriginal assertion
container
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.
Jul 19, 2026Original evidence ↗
CISA KEVoriginal assertion
observed_exploitation
ASUS Routers Improper Authentication Vulnerability
Jul 19, 2026Original evidence ↗
FIRST EPSSoriginal assertion
model_probability
Probability 0.993930000000; percentile 0.999360000000
Jul 19, 2026Original evidence ↗
Applicability
Cited product scope
n/an/a
[{"status": "affected", "version": "n/a"}]unknownUnknown vendorUnknown product
cpe:2.3:h:asus:gt-ac2900:-:*:*:*:*:*:*:*constrainedUnknown vendorUnknown product
cpe:2.3:h:asus:lyra_mini:-:*:*:*:*:*:*:*constrainedUnknown vendorUnknown product
cpe:2.3:o:asus:gt-ac2900_firmware:*:*:*:*:*:*:*:*; end excluding 3.0.0.4.386.42643supportedUnknown vendorUnknown product
cpe:2.3:o:asus:lyra_mini_firmware:*:*:*:*:*:*:*:*; end excluding 3.0.0.4.384.46630supportedAssessments
CVSS by origin
nvd@nist.govCVSS 3.1 · role Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hnvd@nist.govCVSS 2.0 · role Primary
AV:N/AC:L/Au:N/C:P/I:P/A:P134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADPCVSS 3.1 · role unknown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLimitations and unknowns
- KEV membership is authoritative for the catalog, not proof of exposure in any environment.
- EPSS is a dated model probability and not an individual-environment prediction.
- Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
- NVD-carried upstream facts remain derivative and are not independent corroboration.
- Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
- NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
- Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
- Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.