CVE-2026-108971
CRITICAL 9.4A flaw has been found in D-Link DCS-930L B1.08B4. This impacts the function mpfd_decode of the file bootloader_region.bin of the component Emergency HTTP Recovery Server. Executing a manipulation of the argument firmware can lead to improper verification of cryptographic signature. The attack may be performed from remote. The exploit has been published and may be used.
Severe if exploited (CVSS 9.4), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 13th 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: No account or privileges required
- ⚠User interaction: Succeeds with passive user activity
- ✓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.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
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-347: Improper Verification of Cryptographic Signature
- CWE-345: Insufficient Verification of Data Authenticity
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P - CRITICAL 9.6 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 9.6 v3.0 · CNA Primary
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 10 v2.0 · CNA Primary
AV:N/AC:L/Au:N/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:N/UI:P/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 9.6 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - HIGH 10 v2.0 · NVD Secondary
AV:N/AC:L/Au:N/C:C/I:C/A:C
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/sweethub521/somevul/blob/main/dlink-dcs930l-bootloader-emergency-room-flash.md CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380
Advisories
- https://vuldb.com/cve/CVE-2026-108971 CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380 - https://vuldb.com/submit/999605 CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-98294 EUVD · EUVD-2026-98294
Technical & other
- https://vuldb.com/vuln/416789 CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380 - https://vuldb.com/vuln/416789/cti CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380 - https://www.dlink.com/ CVE record · VulDB · Updated 2026-10-13T05:45:16.733Z
NVD · CVE-2026-108971 · Updated 2026-10-14T14:17:36.380