CVE-2026-108893
CRITICAL 9.4A vulnerability was identified in Linksys E1700 up to 1.0.0.4.003. This issue affects the function setVlan of the file /goform/setVlan. Such manipulation of the argument vlan_set leads to stack-based buffer overflow. The attack may be launched remotely. The exploit is publicly available and might 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
0.5%chance of exploitation in 30 days · 45th 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-121: Stack-based Buffer Overflow
- CWE-119: Memory Corruption
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_67/67.md CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003
Advisories
- https://vuldb.com/cve/CVE-2026-108893 CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003 - https://vuldb.com/submit/973112 CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97438 EUVD · EUVD-2026-97438
Technical & other
- https://vuldb.com/vuln/416685 CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003 - https://vuldb.com/vuln/416685/cti CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003 - https://www.linksys.com/ CVE record · VulDB · Updated 2026-10-12T13:45:15.796Z
NVD · CVE-2026-108893 · Updated 2026-10-13T19:18:11.003