Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated remote attacker change the administrator password on a Tinycontrol LAN Controller. If the controller is reachable, an attacker could take over management access and disrupt or manipulate connected control functions.
Executive priority
Prioritize this as an urgent operational technology and edge-device risk if any affected controller is reachable beyond a trusted management network.
Technical view
CVE-2023-54327 is a CWE-862 missing authorization issue in Tinycontrol LAN Controller 1.58a. Sources describe abuse of the /stm.cgi endpoint with a crafted authentication parameter to disable access controls and modify administrative credentials. CVSS is 9.8 critical.
Likely exposure
Exposure is most likely where Tinycontrol LAN Controller 1.58a or HW 3.8 devices are reachable from untrusted networks. The source bundle does not fully clarify all affected versions or patched firmware availability.
Exploitation context
Public exploit reference exists via ExploitDB, but the bundle states KEV is false and provides no cited evidence of active exploitation. Treat internet-exposed devices as urgent because exploitation requires no credentials or user interaction.
Researcher notes
Evidence supports an authentication bypass leading to admin password change. Do not assume broader products, active exploitation, or a specific patch without vendor confirmation. Version coverage is somewhat unclear in the bundle.
Mitigation direction
- Check Tinycontrol guidance for fixed firmware or official mitigation.
- Remove controllers from direct internet exposure immediately.
- Restrict management access to trusted networks or VPN.
- Rotate administrator credentials after isolating affected devices.
- Review logs for unexpected password changes or /stm.cgi access.
- Replace unsupported devices if no vendor fix is available.
Validation and detection
- Inventory Tinycontrol LAN Controller devices and firmware versions.
- Identify any management interfaces reachable from untrusted networks.
- Review web logs for suspicious /stm.cgi requests.
- Confirm administrator credentials were not changed unexpectedly.
- Verify access controls block unauthenticated administrative changes.
- Track vendor advisories for patch or version clarification.
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-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-54327 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
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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
2 official scoresWe 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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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
- ExploitDB-51732CVE reference, VulnCheck · exploit
- Tinycontrol Official Product HomepageCVE reference, VulnCheck · product
- Zero Science Lab Disclosure (ZSL-2023-5787)CVE reference, VulnCheck · third-party-advisory
- VulnCheck Advisory: Tinycontrol LAN Controller 1.58a Authentication Bypass via Admin Password ChangeCVE reference, VulnCheck · third-party-advisory
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.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.