Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.24% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2025
CVE-2025-41697High confidence
Shell access to UART Console
Phoenix Contact · FL SWITCH 2005
6.8MediumCVSS 3.1
Scheduled
Fix not verifiedMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:Medium, unchanged from published severity.unchanged
Compensating controls
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Phoenix Contact FL SWITCH 2005 and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
Fix not verified01
What, why and how
An attacker can use an undocumented UART port on the PCB as a side-channel to get root access e.g. with the credentials obtained from CVE-2025-41692.
What
An attacker can use an undocumented UART port on the PCB as a side-channel to get root access e.g. with the credentials obtained from CVE-2025-41692.
Why
The lack of protections on alternate paths to access control-protected assets (such as unprotected shadow registers and other external facing unguarded interfaces) allows an attacker to bypass existing protections to the asset that are only performed against the primary path.
How
An attacker operating through physical access may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
An attacker can use an undocumented UART port on the PCB as a side-channel to get root access e.g. with the credentials obtained from CVE-2025-41692.
Why
The lack of protections on alternate paths to access control-protected assets (such as unprotected shadow registers and other external facing unguarded interfaces) allows an attacker to bypass existing protections to the asset that are only performed against the primary path.
How
An attacker operating through physical access may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- physical access → Missing Protection Mechanism for Alternate Hardware Interface → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Physical
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-1299 ↗
CWE-1299: Missing Protection Mechanism for Alternate Hardware Interface. The lack of protections on alternate paths to access control-protected assets (such as unprotected shadow registers and other external facing unguarded interfaces) allows an attacker to bypass existing protections to the asset that are only performed against the primary path.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVPhysicalAttack vector: The attacker needs physical access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix not verified
- Affected
- FL SWITCH 2005: 0.0.0 < 3.50
- FL SWITCH 2008: 0.0.0 < 3.50
- FL SWITCH 2016: 0.0.0 < 3.50
- FL SWITCH 2105: 0.0.0 < 3.50
- FL SWITCH 2108: 0.0.0 < 3.50
- FL SWITCH 2116: 0.0.0 < 3.50
- FL SWITCH 2204-2TC-2SFX: 0.0.0 < 3.50
- FL SWITCH 2205: 0.0.0 < 3.50
- FL SWITCH 2206-2FX: 0.0.0 < 3.50
- FL SWITCH 2206-2FX SM: 0.0.0 < 3.50
- FL SWITCH 2206-2FX SM ST: 0.0.0 < 3.50
- FL SWITCH 2206-2FX ST: 0.0.0 < 3.50
- FL SWITCH 2206-2SFX: 0.0.0 < 3.50
- FL SWITCH 2206-2SFX PN: 0.0.0 < 3.50
- FL SWITCH 2206C-2FX: 0.0.0 < 3.50
- FL SWITCH 2207-FX: 0.0.0 < 3.50
- FL SWITCH 2207-FX SM: 0.0.0 < 3.50
- FL SWITCH 2208: 0.0.0 < 3.50
- FL SWITCH 2208 PN: 0.0.0 < 3.50
- FL SWITCH 2208C: 0.0.0 < 3.50
- FL SWITCH 2212-2TC-2SFX: 0.0.0 < 3.50
- FL SWITCH 2214-2FX: 0.0.0 < 3.50
- FL SWITCH 2214-2FX SM: 0.0.0 < 3.50
- FL SWITCH 2214-2SFX: 0.0.0 < 3.50
- FL SWITCH 2214-2SFX PN: 0.0.0 < 3.50
- FL SWITCH 2216: 0.0.0 < 3.50
- FL SWITCH 2216 PN: 0.0.0 < 3.50
- FL SWITCH 2304-2GC-2SFP: 0.0.0 < 3.50
- FL SWITCH 2306-2SFP: 0.0.0 < 3.50
- FL SWITCH 2306-2SFP PN: 0.0.0 < 3.50
- FL SWITCH 2308: 0.0.0 < 3.50
- FL SWITCH 2308 PN: 0.0.0 < 3.50
- FL SWITCH 2312-2GC-2SFP: 0.0.0 < 3.50
- FL SWITCH 2314-2SFP: 0.0.0 < 3.50
- FL SWITCH 2314-2SFP PN: 0.0.0 < 3.50
- FL SWITCH 2316: 0.0.0 < 3.50
- FL SWITCH 2316 PN: 0.0.0 < 3.50
- FL SWITCH 2404-2TC-2SFX: 0.0.0 < 3.50
- FL SWITCH 2406-2SFX: 0.0.0 < 3.50
- FL SWITCH 2406-2SFX PN: 0.0.0 < 3.50
- FL SWITCH 2408: 0.0.0 < 3.50
- FL SWITCH 2408 PN: 0.0.0 < 3.50
- FL SWITCH 2412-2TC-2SFX: 0.0.0 < 3.50
- FL SWITCH 2414-2SFX: 0.0.0 < 3.50
- FL SWITCH 2414-2SFX PN: 0.0.0 < 3.50
- FL SWITCH 2416: 0.0.0 < 3.50
- FL SWITCH 2416 PN: 0.0.0 < 3.50
- FL SWITCH 2504-2GC-2SFP: 0.0.0 < 3.50
- FL SWITCH 2506-2SFP: 0.0.0 < 3.50
- FL SWITCH 2506-2SFP PN: 0.0.0 < 3.50
- FL SWITCH 2508: 0.0.0 < 3.50
- FL SWITCH 2508 PN: 0.0.0 < 3.50
- FL SWITCH 2512-2GC-2SFP: 0.0.0 < 3.50
- FL SWITCH 2514-2SFP: 0.0.0 < 3.50
- FL SWITCH 2514-2SFP PN: 0.0.0 < 3.50
- FL SWITCH 2516: 0.0.0 < 3.50
- FL SWITCH 2516 PN: 0.0.0 < 3.50
- FL SWITCH 2608: 0.0.0 < 3.50
- FL SWITCH 2608 PN: 0.0.0 < 3.50
- FL SWITCH 2708: 0.0.0 < 3.50
- FL SWITCH 2708 PN: 0.0.0 < 3.50
- FL SWITCH 2303-8SP1: 0.0.0 < 3.50
- FL NAT 2008: 0.0.0 < 3.50
- FL NAT 2208: 0.0.0 < 3.50
- FL NAT 2304-2GC-2SFP: 0.0.0 < 3.50
- FL SWITCH 2008F: 0.0.0 < 3.50
- FL SWITCH 2316/K1: 0.0.0 < 3.50
- FL SWITCH 2506-2SFP/K1: 0.0.0 < 3.50
- FL SWITCH 2508/K1: 0.0.0 < 3.50
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 9 Dec 2025 · Last source change 9 Dec 2025, 14:34 UTC · CWE-1299 · Missing Protection Mechanism for Alternate Hardware Interface
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2025-201893
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.CNA ↗
- Before
- 0.0.0 < 3.50 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- FL SWITCH 2005: 0.0.0 < 3.50; FL SWITCH 2008: 0.0.0 < 3.50; FL SWITCH 2016: 0.0.0 < 3.50; FL SWITCH 2105: 0.0.0 < 3.50; FL SWITCH 2108: 0.0.0 < 3.50; FL SWITCH 2116: 0.0.0 < 3.50; FL SWITCH 2204-2TC-2SFX: 0.0.0 < 3.50; FL SWITCH 2205: 0.0.0 < 3.50; FL SWITCH 2206-2FX: 0.0.0 < 3.50; FL SWITCH 2206-2FX SM: 0.0.0 < 3.50; FL SWITCH 2206-2FX SM ST: 0.0.0 < 3.50; FL SWITCH 2206-2FX ST: 0.0.0 < 3.50; FL SWITCH 2206-2SFX: 0.0.0 < 3.50; FL SWITCH 2206-2SFX PN: 0.0.0 < 3.50; FL SWITCH 2206C-2FX: 0.0.0 < 3.50; FL SWITCH 2207-FX: 0.0.0 < 3.50; FL SWITCH 2207-FX SM: 0.0.0 < 3.50; FL SWITCH 2208: 0.0.0 < 3.50; FL SWITCH 2208 PN: 0.0.0 < 3.50; FL SWITCH 2208C: 0.0.0 < 3.50; FL SWITCH 2212-2TC-2SFX: 0.0.0 < 3.50; FL SWITCH 2214-2FX: 0.0.0 < 3.50; FL SWITCH 2214-2FX SM: 0.0.0 < 3.50; FL SWITCH 2214-2SFX: 0.0.0 < 3.50; FL SWITCH 2214-2SFX PN: 0.0.0 < 3.50; FL SWITCH 2216: 0.0.0 < 3.50; FL SWITCH 2216 PN: 0.0.0 < 3.50; FL SWITCH 2304-2GC-2SFP: 0.0.0 < 3.50; FL SWITCH 2306-2SFP: 0.0.0 < 3.50; FL SWITCH 2306-2SFP PN: 0.0.0 < 3.50; FL SWITCH 2308: 0.0.0 < 3.50; FL SWITCH 2308 PN: 0.0.0 < 3.50; FL SWITCH 2312-2GC-2SFP: 0.0.0 < 3.50; FL SWITCH 2314-2SFP: 0.0.0 < 3.50; FL SWITCH 2314-2SFP PN: 0.0.0 < 3.50; FL SWITCH 2316: 0.0.0 < 3.50; FL SWITCH 2316 PN: 0.0.0 < 3.50; FL SWITCH 2404-2TC-2SFX: 0.0.0 < 3.50; FL SWITCH 2406-2SFX: 0.0.0 < 3.50; FL SWITCH 2406-2SFX PN: 0.0.0 < 3.50; FL SWITCH 2408: 0.0.0 < 3.50; FL SWITCH 2408 PN: 0.0.0 < 3.50; FL SWITCH 2412-2TC-2SFX: 0.0.0 < 3.50; FL SWITCH 2414-2SFX: 0.0.0 < 3.50; FL SWITCH 2414-2SFX PN: 0.0.0 < 3.50; FL SWITCH 2416: 0.0.0 < 3.50; FL SWITCH 2416 PN: 0.0.0 < 3.50; FL SWITCH 2504-2GC-2SFP: 0.0.0 < 3.50; FL SWITCH 2506-2SFP: 0.0.0 < 3.50; FL SWITCH 2506-2SFP PN: 0.0.0 < 3.50; FL SWITCH 2508: 0.0.0 < 3.50; FL SWITCH 2508 PN: 0.0.0 < 3.50; FL SWITCH 2512-2GC-2SFP: 0.0.0 < 3.50; FL SWITCH 2514-2SFP: 0.0.0 < 3.50; FL SWITCH 2514-2SFP PN: 0.0.0 < 3.50; FL SWITCH 2516: 0.0.0 < 3.50; FL SWITCH 2516 PN: 0.0.0 < 3.50; FL SWITCH 2608: 0.0.0 < 3.50; FL SWITCH 2608 PN: 0.0.0 < 3.50; FL SWITCH 2708: 0.0.0 < 3.50; FL SWITCH 2708 PN: 0.0.0 < 3.50; FL SWITCH 2303-8SP1: 0.0.0 < 3.50; FL NAT 2008: 0.0.0 < 3.50; FL NAT 2208: 0.0.0 < 3.50; FL NAT 2304-2GC-2SFP: 0.0.0 < 3.50; FL SWITCH 2008F: 0.0.0 < 3.50; FL SWITCH 2316/K1: 0.0.0 < 3.50; FL SWITCH 2506-2SFP/K1: 0.0.0 < 3.50; FL SWITCH 2508/K1: 0.0.0 < 3.50 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.