Security readout for executives and security teams
Plain-English summary
CVE-2023-36091 is a critical authentication bypass in unsupported D-Link DIR-895 firmware FW102b07. A remote unauthenticated attacker could gain elevated privileges, creating risk of router takeover, network interception, or service disruption. The public record says the affected product is no longer supported, so replacement or strong isolation should be prioritized.
Executive priority
Treat this as urgent for any environment still using D-Link DIR-895 FW102b07. Because the issue is critical, remote, unauthenticated, and affects unsupported firmware, leadership should prioritize asset discovery, exposure reduction, and replacement planning over waiting for a conventional patch path.
Technical view
The CVE describes CWE-863 improper authorization in phpcgi_main within cgibin on D-Link DIR-895 FW102b07. CVSS 3.1 is 9.8 with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact. Structured affected-product metadata is incomplete, but the description names DIR-895 FW102b07.
Likely exposure
Exposure is most likely where D-Link DIR-895 devices running FW102b07 remain deployed, especially with remote administration or web management reachable from untrusted networks. The CVE notes the affected product is unsupported, increasing remediation difficulty.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. The CVSS vector indicates remote unauthenticated exploitation is plausible, but no cited source in the bundle confirms exploit availability, exploitation in the wild, or a vendor patch for this exact issue.
Researcher notes
Evidence is concise but limited. The CVE description identifies DIR-895 FW102b07, phpcgi_main in cgibin, authentication bypass, and unsupported status. NVD-style affected metadata in the bundle is listed as n/a, so validation should rely on device model, firmware, and vendor bulletin checks rather than broad product assumptions.
Mitigation direction
- Inventory for D-Link DIR-895 devices and confirm firmware version FW102b07.
- Check D-Link security bulletin and support pages for any product-specific guidance.
- Replace or retire unsupported affected devices where feasible.
- Disable internet-facing management and restrict administration to trusted networks.
- Monitor for unexpected configuration changes or administrator access.
Validation and detection
- Confirm whether any deployed routers match D-Link DIR-895 FW102b07.
- Verify management interfaces are not reachable from the public internet.
- Review device configuration for unexpected admin users, DNS, routing, or port-forwarding changes.
- Document vendor support status and remediation decision for each identified device.
- Track CISA KEV and vendor bulletin updates for any exploitation or guidance changes.
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-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2023-36091 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.
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:H3.95.9Primary CVE scoreVulnerability 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
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dlink.com/en/security-bulletin/CVE reference
- https://www.dlink.com/en/supportCVE reference
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.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.