CVE-2026-108896
CRITICAL 9.4A vulnerability was found in Linksys E1700 1.0.0.4.003. This affects the function setLinksysIpv6 of the file /goform/setLinksysIpv6. The manipulation of the argument _6rd_prefix/_6rd_prefix_len results in os command injection. The attack can be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severe if exploited (CVSS 9.4), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
2.2%chance of exploitation in 30 days · 82nd percentile
Impact if exploited
9.4CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-78: OS Command Injection
- CWE-77: Command Injection
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
References and research data (JSON)
All CVSS metrics
- CRITICAL 9.4 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P - CRITICAL 9.9 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 9.9 v3.0 · CNA Primary
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 9 v2.0 · CNA Primary
AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR - HIGH 8.6 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CRITICAL 9.9 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - HIGH 9 v2.0 · NVD Secondary
AV:N/AC:L/Au:S/C:C/I:C/A:C
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/wudipjq/my_vuln/blob/main/Linksys3/vuln_70/70.md CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187
Advisories
- https://vuldb.com/cve/CVE-2026-108896 CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187 - https://vuldb.com/submit/973115 CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97470 EUVD · EUVD-2026-97470
Technical & other
- https://vuldb.com/vuln/416683 CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187 - https://vuldb.com/vuln/416683/cti CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187 - https://www.linksys.com/ CVE record · VulDB · Updated 2026-10-12T14:30:14.340Z
NVD · CVE-2026-108896 · Updated 2026-10-15T16:17:39.187