Security readout for executives and security teams
Plain-English summary
SteelSeries GG for macOS version 107.0.0 reportedly contains a buffer overflow that could let an unauthenticated remote attacker run code, potentially compromising data, system integrity, and availability. The supplied sources do not identify other affected versions or confirm a fixed release.
Executive priority
Treat this as an urgent verification and remediation task because the reported impact is unauthenticated remote code execution with complete confidentiality, integrity, and availability consequences. Escalate internet-exposed or privileged endpoints first, while recognizing that active exploitation is not confirmed.
Technical view
CVE-2026-39255 is classified as CWE-120 and attributed to libSSEdevice.dylib and dup_wcs components. Its CVSS 3.1 score is 9.8, with network reachability, low attack complexity, no privileges, and no user interaction reported. Detailed triggering conditions are not established in the supplied bundle.
Likely exposure
Exposure is most credible on Macs running SteelSeries GG 107.0.0. The structured affected-product data is unspecified, so broader version exposure cannot be determined from this bundle. Inventory evidence should be treated as the primary scoping source.
Exploitation context
The CVSS vector describes remotely reachable, unauthenticated code execution without user interaction. However, the CVE is not listed as KEV in the supplied bundle, and no cited evidence confirms active exploitation. Practical reachability and prerequisites remain unclear.
Researcher notes
The supplied record names version 107.0.0 and two components, but its structured vendor, product, version, and CPE fields are unspecified. Confirm the upstream research details and vendor advisory before making broader affected-version claims. Avoid interpreting the CVSS vector alone as proof of exploitability in every deployment.
Mitigation direction
- Identify and prioritize Macs running SteelSeries GG 107.0.0.
- Check SteelSeries guidance for a fixed release or supported mitigation.
- Restrict unnecessary network exposure involving affected installations where operationally feasible.
- Consider temporarily removing the application from high-value systems if no vendor remedy exists.
Validation and detection
- Confirm installed SteelSeries GG versions through endpoint inventory.
- Verify whether libSSEdevice.dylib is present on potentially affected Macs.
- Review vendor guidance and confirm remediated versions after updating.
- Monitor endpoint telemetry for unusual processes launched from SteelSeries GG components.
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-120: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-39255 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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
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
- https://github.com/Cipher-Security-Labs/research/tree/main/CSL-2026-03CVE reference, mitre
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.
Buffer Copy without Checking Size of Input
Buffer Copy without Checking Size of Input represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.