Evidence used
- No CISA KEV confirmation is currently recorded.
- Exploitation requires an existing local or physical foothold with privileges.
- EPSS is 0.32% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2025
CVE-2025-30485High confidence
UNIX symbolic link (Symlink) following issue exists in FutureNet NXR series, VXR series and WXR series routers
Century Systems Co., Ltd. · FutureNet NXR-1420
6.2MediumCVSS 3.0
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:Low, lowered one band.downgradedsince 3 Apr 2025
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 Century Systems Co., Ltd. FutureNet NXR-1420 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
UNIX symbolic link (Symlink) following issue exists in FutureNet NXR series, VXR series and WXR series routers. Attaching to the affected product an external storage containing malicious symbolic link files, a logged-in administrative user may obtain and/or destroy internal files.
What
UNIX symbolic link (Symlink) following issue exists in FutureNet NXR series, VXR series and WXR series routers. Attaching to the affected product an external storage containing malicious symbolic link files, a logged-in administrative user may obtain and/or destroy internal files.
Why
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
How
An attacker operating through physical access may attempt exploitation with elevated privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
UNIX symbolic link (Symlink) following issue exists in FutureNet NXR series, VXR series and WXR series routers. Attaching to the affected product an external storage containing malicious symbolic link files, a logged-in administrative user may obtain and/or destroy internal files.
Why
The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
How
An attacker operating through physical access may attempt exploitation with elevated privileges. 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 → UNIX Symbolic Link (Symlink) Following → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Physical
- Privileges required
- High: elevated access is required
- 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-61 ↗
CWE-61: UNIX Symbolic Link (Symlink) Following. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HCommon Vulnerability Scoring System 3.0: 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.PRHighPrivileges required: The attacker needs elevated or administrative 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
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
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
- FutureNet NXR-1420: firmware version 31.0.1 and earlier
- FutureNet NXR-1300 series: firmware version 7.4.12 and earlier
- FutureNet NXR-650: firmware version 21.16.5 and earlier
- FutureNet NXR-610X series: firmware version 21.14.11D and earlier
- FutureNet NXR-530: firmware version 21.11.15 and earlier
- FutureNet NXR-350/C: firmware version 5.30.9C and earlier
- FutureNet NXR-230/C: firmware version 5.30.13 and earlier
- FutureNet NXR-160/LW: firmware version 21.8.4 and earlier
- FutureNet NXR-G540 series: firmware version 21.17.0
- FutureNet NXR-G260 series: firmware version 9.12.17 and earlier
- FutureNet NXR-G240 series: firmware version 9.12.17 and earlier
- FutureNet NXR-G180/L-CA: firmware version 21.7.33 and earlier
- FutureNet NXR-G120 series: firmware version 21.15.2C1 and earlier
- FutureNet NXR-G110 series: firmware version 21.15.10 and earlier
- FutureNet NXR-G100 series: firmware version 6.23.11 and earlier
- FutureNet NXR-G060 series: firmware version 21.15.6C2 and earlier
- FutureNet NXR-G050 series: firmware version 21.12.11 and earlier
- FutureNet VXR-x64: firmware version 21.7.33 and earlier
- FutureNet VXR-x86: firmware version 10.1.5 and earlier
- FutureNet NXR-1200: N/A
- FutureNet NXR-130/C: N/A
- FutureNet NXR-155/C-L: N/A
- FutureNet NXR-155/C-XW: N/A
- FutureNet NXR-155/C-WM: N/A
- FutureNet NXR-125/CX: N/A
- FutureNet NXR-120/C: N/A
- FutureNet NXR-G100/SLW: N/A
- FutureNet NXR-G100/SL: N/A
- FutureNet NXR-G100/S: N/A
- FutureNet NXR-G100/N: N/A
- FutureNet NXR-G100/F: N/A
- FutureNet WXR-250: N/A
- 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 3 Apr 2025 · Last source change 3 Apr 2025, 13:41 UTC · CWE-61 · UNIX Symbolic Link (Symlink) Following
CVE recordCVE.org · 5.1
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-2025-9602
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
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.