Security readout for executives and security teams
Plain-English summary
Nexxt Nebula 300+ routers running firmware 12.01.01.37 or earlier may accept configuration changes initiated by a malicious website while an administrator is signed in. This could let an attacker alter system settings or enable services without directly authenticating to the router.
Executive priority
Prioritize identification and containment of affected routers, especially where administrators manage them from general-purpose browsing systems. Treat remediation as high priority, but do not claim emergency active-exploitation status. Patch availability is not established by the supplied sources, so obtain current vendor guidance.
Technical view
Administrative state-changing endpoints, including /goform/setSysTools, reportedly lack cross-site request forgery protections. A remote attacker can induce an authenticated administrator’s browser to submit unauthorized requests. The CVSS 4.0 score is 7.2, reflecting high integrity and availability impact with required user interaction.
Likely exposure
Exposure is limited to Nexxt Solutions Nebula 300+ devices running firmware through 12.01.01.37. Exploitation requires an authenticated administrator’s browser to reach the management interface and interact with attacker-controlled content. The supplied evidence does not establish whether management interfaces are commonly internet-accessible.
Exploitation context
The CVE is not listed as CISA KEV in the supplied bundle, and no cited source reports active exploitation or a public exploit. The attack still presents meaningful risk because it requires no attacker privileges, though administrator interaction and an active authenticated session are necessary.
Researcher notes
The bundle identifies CWE-352 and names /goform/setSysTools among affected administrative interfaces, but does not enumerate every vulnerable endpoint. It supplies firmware and product references without a vendor security advisory, confirmed fix, exploit evidence, or detailed validation results. Broader endpoint coverage and remediation status therefore remain uncertain.
Mitigation direction
- Inventory Nebula 300+ devices and identify firmware versions at or below 12.01.01.37.
- Check Nexxt Solutions guidance for patched firmware or an approved remediation.
- Restrict management-interface access to trusted networks and authorized administrative systems.
- Avoid browsing untrusted content while authenticated to the router administration interface.
- Review device configurations for unauthorized services or unexpected system-setting changes.
Validation and detection
- Verify each device model and installed firmware version against the affected range.
- Confirm the management interface is inaccessible from untrusted networks.
- Inspect administrative requests for anti-CSRF tokens or equivalent request-origin validation.
- Review available logs and configuration history for unexplained administrative changes.
- After remediation, repeat authorized CSRF-control testing in an isolated environment.
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-352: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-31849 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
- High
- CVSS
- 7.2 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/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:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N——TuranSecVulnerability scoring details
Base CVSS 4.0 score
7.2HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/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
- Official product pageCVE reference, TuranSec · third-party-advisory
- Firmware downloadCVE 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.
Cross-Site Request Forgery (CSRF)
Cross-Site Request Forgery (CSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.