TI-2025-21121 Aliases CVE-2025-29515 GHSA-prjv-p6ff-2r98

Incorrect access control in the DELT_file.xgi endpoint of D-Link DSL-7740C with firmware…

HIGH 82CWE-284Published 2025-08-25 · Updated 2025-08-25

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.

Summary

Incorrect access control in the DELT_file.xgi endpoint of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows attackers to modify arbitrary settings within the device's XML database, including the administrator’s password.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00621 50th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
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
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:dlink:dsl-7740c_firmware:6.tr069.20211230:::::::*	6.tr069.20211230	Vulnerable	D-Link Japan K.K.
cpe:2.3:h:dlink:dsl-7740c:-:::::::*	not specified by NVD	Running on	D-Link Japan K.K.

cpe:2.3:o:dlink:dsl-7740c_firmware:6.tr069.20211230:*:*:*:*:*:*:* Versions 6.tr069.20211230 Vulnerable ·D-Link Japan K.K.
cpe:2.3:h:dlink:dsl-7740c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link Japan K.K.

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-29515
2026-10-03 Alias added: GHSA-prjv-p6ff-2r98
2026-11-07 EPSS moved to the 50th–90th percentile

References

Exploit 1

https://gist.github.com/stevenyu113228/0bf32385245f71dfe11b0ef77c468392

Advisory 1

https://www.dlink.com/en/security-bulletin/

TI-2025-21120 Incorrect access control in the config.xgi function of D-Link DSL-7740C with firmware… CVSS 3.1CRITICAL 9.8
TI-2025-21127 D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 was discovered to contain a… CVSS 3.1MEDIUM 6.5
TI-2025-21128 D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 was discovered to contain a… CVSS 3.1HIGH 7.2
TI-2025-21122 D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 was discovered to contain a… CVSS 3.1HIGH 7.2
TI-2025-21124 A command injection vulnerability in the EXE parameter of D-Link DSL-7740C with firmware… CVSS 3.1MEDIUM 5.3
TI-2025-21123 D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 was discovered to contain a… CVSS 3.1MEDIUM 6.8

See all 9 →

Sources

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