Incorrect access control in the Maintenance module of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows authenticated attack…

published 2025-08-25 last yr. modified 2026-06-17 4mo ago also EUVD-2025-27745

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

Incorrect access control in the Maintenance module of D-Link DSL-7740C with firmware DSL7740C.V6.TR069.20211230 allows authenticated attackers with low-level privileges to arbitrarily change the high-privileged account passwords and escalate privileges.

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CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: last yr. (2025-08-26)

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

gist.github.com https://gist.github.com/stevenyu113228/da01c377030fd8c92274feca54661202 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Classification

Weakness

CWE-284 Improper Access Control

References

gist.github.com /stevenyu113228/da01c377030fd8c92274feca54661202
exploit, third-party-advisory
dlink.com /en/security-bulletin/
vendor-advisory

Sources

CVE List CVE-2025-29520
NVD CVE-2025-29520

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