Security readout for executives and security teams
Plain-English summary
CVE-2026-52101 is a critical issue in andreimarcu linx-server versions 1.0 through 2.3.8. A remote, unauthenticated attacker may obtain sensitive information through the uploadRemote function in upload.go. The provided sources do not name a fixed version or vendor mitigation.
Executive priority
Treat this as urgent for any exposed linx-server deployment. The issue is recent, critical, remotely reachable, and unauthenticated. Prioritize asset identification and exposure reduction first because the provided sources do not identify a definitive patch.
Technical view
The CVSS 3.1 score is 9.1 with network attack vector, low complexity, no privileges, and no user interaction. The CVE is mapped to CWE-200. The vector rates confidentiality and integrity impact as high, but the bundle only describes sensitive information exposure and does not explain the integrity impact.
Likely exposure
Exposure is likely limited to organizations running andreimarcu linx-server versions 1.0 through 2.3.8, especially if reachable over a network. The CVE record lists no CPEs, vendor, or product metadata, so asset matching may require repository, package, and deployment inventory checks.
Exploitation context
The bundle does not show KEV listing or cited evidence of active exploitation. The CVSS vector indicates remote unauthenticated exploitation is plausible, but the provided sources do not include exploit status, proof maturity, or observed attacks.
Researcher notes
Evidence is thin: the source bundle gives description, CVSS, CWE-200, affected version range, and two GitHub references. It does not provide CPEs, fixed versions, exploit telemetry, or detailed root-cause analysis. Validate findings against the CVE record and upstream repository before broad conclusions.
Mitigation direction
- Inventory andreimarcu linx-server deployments and versions immediately.
- Remove internet exposure for affected instances where possible.
- Restrict access behind trusted network controls while awaiting vendor guidance.
- Check upstream repository and CVE references for a confirmed fixed release.
- Monitor logs for unusual remote upload and sensitive data access patterns.
Validation and detection
- Confirm whether any deployment uses versions 1.0 through 2.3.8.
- Map exposed services to linx-server repository or build provenance.
- Review configuration and routes involving uploadRemote in upload.go.
- Check CVE and upstream references for updated remediation details.
- Document compensating controls for any instance that cannot be upgraded.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2026-52101 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
- 9.1 (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: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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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://github.com/andreimarcu/linx-serverCVE reference, mitre
- https://github.com/nk7667/-linx-server-vulnerability-report/blob/main/CVE-2026-52101.mdCVE 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.