Security readout for executives and security teams
Plain-English summary
Nexxt Nebula 300+ routers through firmware 12.01.01.37 can place administrator passwords and WiFi keys in readable form inside exported configuration backups. Anyone who obtains a backup may recover those secrets directly, potentially enabling router administration or WiFi access.
Executive priority
Treat as a moderate-priority credential exposure issue. Prioritize environments where backups are routinely exported, broadly accessible, or previously shared. Rapid credential rotation is warranted when exposure is suspected, but the supplied sources do not document active attacks or a vendor-fixed version.
Technical view
The configuration export function stores administrative credentials and WiFi pre-shared keys without encryption or hashing, consistent with CWE-256. CVSS 4.0 scores it 6.8: exploitation requires adjacent access and high privileges, while the stated impact is high confidentiality loss without direct integrity or availability impact.
Likely exposure
Exposure is most likely where affected routers are deployed and configuration backups have been exported, retained, transferred, or shared. Risk increases when backup files are accessible beyond trusted administrators. The sources do not identify particular storage locations, deployment sectors, or an internet-based attack path.
Exploitation context
No active exploitation is established: the CVE is not listed as KEV in the supplied bundle, and no cited source reports exploitation. An attacker must first obtain a backup through legitimate privileged functionality or another unspecified weakness; possession then permits direct extraction of stored secrets.
Researcher notes
The affected range is stated as firmware through 12.01.01.37. The bundle does not name a fixed release, vendor mitigation, proof of concept, or observed exploitation. “Other weaknesses” that could disclose backups are not specified, so broader attack-chain conclusions would be unsupported.
Mitigation direction
- Inventory Nebula 300+ devices and identify firmware versions through 12.01.01.37.
- Restrict configuration export access to trusted administrators.
- Securely restrict or remove unnecessary backup copies from shared storage and messaging systems.
- Rotate administrator credentials and WiFi keys if backup exposure is suspected.
- Check Nexxt Solutions guidance for patched firmware or an approved mitigation.
Validation and detection
- Confirm each device model and installed firmware version.
- Locate exported Nebula 300+ configuration backups across administrative storage.
- Review backup access permissions, transfer history, and unintended sharing.
- After remediation, export a test backup and verify secrets are not readable.
- Confirm rotated credentials and WiFi keys no longer match potentially exposed backups.
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-256: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCVE-2026-31850 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
- Medium
- CVSS
- 6.8 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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
1 official scoreWe 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:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——TuranSecVulnerability scoring details
Base CVSS 4.0 score
6.8MediumVector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
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
- https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/CVE reference, TuranSec · third-party-advisory
- https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zipCVE reference, TuranSec · 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.
Plaintext Storage of a Password
Plaintext Storage of a Password represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.