Security readout for executives and security teams
Plain-English summary
CVE-2021-39245 describes hardcoded web credentials protecting getlogs.cgi on specific Altus Nexto, Nexto Xpress, and Hadron Xtorm devices. In business terms, affected industrial devices may expose diagnostic log access to anyone who knows the shared credentials. The source bundle does not provide CVSS severity, a vendor fix, or confirmed active exploitation.
Executive priority
Prioritize asset identification and network containment for affected operational technology environments. The absence of CVSS and active exploitation evidence prevents a confident severity rating, but hardcoded shared credentials on industrial devices are operationally significant when reachable by unauthorized users.
Technical view
The issue is hardcoded .htaccess credentials for getlogs.cgi on listed Altus device models and firmware versions, including Nexto NX3003/NX3004/NX3005 1.8.11.0, NX3010/NX3020/NX3030 1.8.3.0, NX5100/NX5101 1.8.11.0, NX5110/NX5210 1.1.2.8, Xpress XP300/315/325/340 1.8.11.0, and Hadron Xtorm HX3040 1.7.58.0.
Likely exposure
Exposure is likely limited to organizations operating the named Altus industrial devices and firmware versions, especially where the device web interface is reachable from untrusted networks. The source bundle does not prove internet exposure, default deployment posture, or whether other firmware versions are affected.
Exploitation context
A public Full Disclosure reference exists, but the bundle does not include KEV listing, active exploitation evidence, exploit maturity, or observed attacks. Treat public knowledge as a reason to prioritize identification and containment, not as proof of exploitation in the wild.
Researcher notes
Evidence is narrow: the CVE description names affected models and versions, but severity, CWE, patch status, and exploit status are not supplied. The affected vendor/product fields in the bundle are generic despite the description listing Altus device families.
Mitigation direction
- Inventory Altus Nexto, Nexto Xpress, and Hadron Xtorm devices and firmware versions.
- Check Altus support or advisories for corrected firmware or official mitigation guidance.
- Restrict device web interfaces to trusted management networks only.
- Remove internet exposure and require VPN or equivalent controlled access.
- Monitor web access to getlogs.cgi and related diagnostic endpoints.
Validation and detection
- Confirm whether deployed models and firmware match the affected list.
- Review network paths to determine who can reach each device web interface.
- Check web server or gateway logs for getlogs.cgi access attempts.
- Verify with Altus whether installed firmware contains a remediation.
- Document compensating controls for devices that cannot be upgraded promptly.
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.
CVE-2021-39245 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.altus.com.br/CVE reference · x_refsource_MISC
- https://seclists.org/fulldisclosure/2021/Aug/21CVE reference · x_refsource_MISC
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.