CVE-2025-25740Public exploitNetwork attack vector

Memory corruption via oversized QuickVPN PSK

Published Feb 14, 2025 · Updated Mar 17, 2025

Stack-based buffer overflow in D-Link DIR-853 A1 firmware 1.20B07 allows remote authenticated users to corrupt memory via a crafted PSK. SetQuickVPNSettings fails to bound the PSK value before it overruns a stack buffer. Low privileges and user interaction are required; successful exploitation can disclose or alter data and interrupt router service.

CVSS severity5.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in D-Link DIR-853 A1 firmware 1.20B07 allows remote authenticated users to corrupt memory via a crafted PSK. SetQuickVPNSettings fails to bound the PSK value before it overruns a stack buffer. Low privileges and user interaction are required; successful exploitation can disclose or alter data and interrupt router service.

The record

CVE
CVE-2025-25740
Published
Feb 14, 2025
Updated
Mar 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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