What is CVE-2025-25740?

CVE-2025-25740 is a medium-severity vulnerability in Dlink Dir-853, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2025-02-14.

How severe is CVE-2025-25740?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2025-25740 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Dlink Dir-853

CVE-2025-25740

D-Link DIR-853 A1 FW1.20B07 was discovered to contain a stack-based buffer overflow vulnerability via the PSK parameter in the SetQuickVPNSettings module.

Vulnerability class: Buffer Overflow

Published 2025-02-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (23.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Dlink Dir-853 — versions a1
Dlink Dir-853 Firmware — versions 1.20b07

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

Public proof-of-concept exploits

yikesoftware/yikesoftware

References

dear-sunshine-ba5.notion.site/D-Link-DIR-853-2-1812386a66448036a1cce259beb30b04 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-25740?: CVE-2025-25740 is a medium-severity vulnerability in Dlink Dir-853, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2025-02-14.
How severe is CVE-2025-25740?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2025-25740 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.