Read the docs
TI-2026-70981 Aliases CVE-2026-108896GHSA-4jv4-xw7r-ghwf

OS command injection in Linksys E1700 setLinksysIpv6 handler

Priority HIGH 76CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

A vulnerability in Linksys E1700 from version 1.0.0.4.003 affects the setLinksysIpv6 function. User-supplied input in the _6rd_prefix and _6rd_prefix_len arguments reaches an OS command without neutralization, causing OS command injection (CWE-78). A remote attacker with low privileges can run commands on the device. A public exploit has been published.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02202 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinksysE17001.0.0.4.003—No fix listedCNA
  • E1700 VendorLinksys Affected 1.0.0.4.003 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:o:linksys:e1700_firmware:*:*:*:*:*:*:*:*——Linksys
  • cpe:2.3:o:linksys:e1700_firmware:*:*:*:*:*:*:*:* Versions — — ·Linksys

Remediation

No fixed version is listed for Linksys E1700. The vendor did not respond to early disclosure.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-108896
  2. 2026-10-12 Alias added: GHSA-4jv4-xw7r-ghwf
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-16 Priority changed: MEDIUM → HIGH

References

Exploit 1

Other 1

  • TI-2025-24206 Linksys Routers E/WAG/WAP/WES/WET/WRT-Series CVSS 4.0CRITICAL 10.0
  • TI-2017-12715 OS command injection in Linksys WVBR0 CVSS 3.0CRITICAL 9.8
  • TI-2026-70977 Stack-based buffer overflow in Linksys E1700 Mac Filter CVSS 4.0CRITICAL 10.0
  • TI-2026-22199 Missing neutralization in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
  • TI-2026-22198 Missing neutralization in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
  • TI-2026-22197 Missing authentication in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
See all 253 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences