Security readout for executives and security teams
Plain-English summary
This flaw exposes a switch user password by storing it in a browser cookie using Base64, which is easily reversible. Anyone who obtains that cookie value can recover the plaintext password. For organizations using the Binardat 10G08-0800GSM switch, this creates a direct credential exposure risk.
Executive priority
Treat as a high-priority credential exposure issue for any deployed Binardat 10G08-0800GSM switches. Prioritize inventory, firmware verification, restricted management access, and credential rotation. Urgency is highest where switch administration occurs from shared systems or exposed management networks.
Technical view
CVE-2026-27520 affects Binardat 10G08-0800GSM firmware prior to V300SP10260209. The web interface stores a user password client-side in a Base64-encoded cookie. This is CWE-312, cleartext storage of sensitive information. CVSS v4.0 is 8.7, driven by high confidentiality impact and low attack complexity.
Likely exposure
Exposure is limited to environments using the Binardat 10G08-0800GSM managed switch with affected firmware and its web interface. Risk depends on whether attackers can obtain browser cookie values from administrators or users of that interface.
Exploitation context
The provided sources do not report active exploitation, and CISA KEV status is false. The core abuse condition is access to the cookie value; once obtained, Base64 decoding reveals the stored password. No public exploit details are included in the supplied sources.
Researcher notes
The evidence identifies insecure client-side password storage, not a remote code execution issue. The source bundle does not include exploit publication or real-world exploitation. Version wording indicates firmware prior to V300SP10260209 is affected; confirm final remediation details with Binardat or the VulnCheck advisory.
Mitigation direction
- Identify Binardat 10G08-0800GSM switches in your environment.
- Check firmware version against V300SP10260209.
- Upgrade to V300SP10260209 or later if available from Binardat guidance.
- Restrict web management access to trusted administrative networks.
- Rotate affected switch credentials after remediation.
Validation and detection
- Confirm the exact model and firmware version on each device.
- Review vendor or advisory guidance for affected-version details.
- Verify web management is not exposed to untrusted networks.
- After updating, confirm passwords are not stored in client-side cookies.
- Review recent web interface access for unusual activity.
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-312: 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 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-2026-27520 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
- 8.7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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.
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:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
8.7HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.binardat.com/products/8-port-10-gigabit-sfp-managed-switch,-support-1g-sfp-and-10g-sfp-module,-160gbps-bandwidth,-l3-web-managed,-metal-fanless-fiber-binardat-network-switchCVE reference · product
- https://www.vulncheck.com/advisories/binardat-10g08-0800gsm-network-switch-base64-encoded-password-stored-in-cookieCVE reference · 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.
Cleartext Storage of Sensitive Information
Cleartext Storage of Sensitive Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.