TI-2026-71542 Aliases CVE-2026-108971 GHSA-5vhf-mw8w-298v

Improper signature verification in D-Link DCS-930L recovery server

HIGH 76CWE-345Published 2026-10-13 · Updated 2026-10-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
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-345.

Summary

D-Link DCS-930L from B1.08B4 has an Emergency HTTP Recovery Server flaw in the mpfd_decode function of bootloader_region.bin. Manipulating the firmware argument leads to improper verification of the cryptographic signature (CWE-347). A remote attacker needs no privileges, though the attack requires some user interaction. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

A 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00225 13th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
D-Link	DCS-930L	B1.08B4	—	No fix listed	CNA

DCS-930L VendorD-Link Affected B1.08B4 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:h:d-link:dcs-930l::::::::	—	—	D-Link

cpe:2.3:h:d-link:dcs-930l:*:*:*:*:*:*:*:* Versions — — ·D-Link

Remediation

The sources list no fixed version for D-Link DCS-930L.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

2026-10-13 Threatist record created from CVE-2026-108971
2026-10-13 Alias added: GHSA-5vhf-mw8w-298v
2026-10-14 CISA SSVC decision points changed
2026-10-14 Priority changed: MEDIUM → HIGH

References

Exploit 1

https://github.com/sweethub521/somevul/blob/main/dlink-dcs930l-bootloader-emergency-room-flash.md

Other 1

https://www.dlink.com/

TI-2024-03070 D-Link DNS-320L/DNS-325/DNS-327L/DNS-340L HTTP GET Request nas_sharing.cgi command injection KEVCVSS 3.1CRITICAL 9.8
TI-2024-03069 D-Link DNS-320L/DNS-325/DNS-327L/DNS-340L HTTP GET Request nas_sharing.cgi hard-coded credentials KEVCVSS 3.1CRITICAL 9.8
TI-2024-00708 D-Link DIR-859 HTTP POST Request hedwig.cgi path traversal KEVCVSS 3.1CRITICAL 9.8
TI-2023-10693 OS Command injection vulnerability in D-Link DIR820LA1_FW105B03 allows attackers to… KEVCVSS 3.1CRITICAL 9.8
TI-2022-17249 D-Link Go-RT-AC750 GORTAC750_revA_v101b03 and GO-RT-AC750_revB_FWv200b02 are vulnerable… KEVCVSS 3.1CRITICAL 9.8
TI-2022-09657 D-Link DIR-820L 1.05B03 was discovered to contain remote command execution (RCE)… KEVCVSS 3.1CRITICAL 9.8

See all 979 →

Sources

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