CVE-2025-2621: A vulnerability was found in D-Link DAP-1620 1.03 and classified as critical

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2025-2621 is a critical-severity flaw (CVSS 9.8) affecting dap-1620 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in D-Link DAP-1620 1.03 and classified as critical. This issue affects the function check_dws_cookie of the file /storage. The manipulation of the argument uid leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-119, CWE-121, CWE-787
Published	2025-03-22
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-22 17:15 UTCPublished CVE record published
2026-06-17 09:07 UTCUpdated Record last modified

dlink dap-1620 firmware MITIGATE

Affected: 1.03

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.03

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · ibus-typing-booster · FIXED · 2.31.3-1.eln159 · FEDORA-2026-c895c68d60 · source

sudo dnf upgrade --advisory=FEDORA-2026-c895c68d60

Fedora 46 · perl-WWW-OrangeHRM-Client · FIXED · 0.12.0-21.fc46 · FEDORA-2026-2d14efca09 · source

sudo dnf upgrade --advisory=FEDORA-2026-2d14efca09

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2621?

dap-1620 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-2621 being exploited?

CVE-2025-2621 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2621 affect?

CVE-2025-2621 affects dap-1620 firmware. Severity is critical (CVSS 9.8). A vulnerability was found in D-Link DAP-1620 1.03 and classified as critical. This issue affects the function check_dws_cookie of the file /storage. The manipulation of the argument uid leads to stack-based buffer overflow. The attack may b

How urgent is CVE-2025-2621?

Priority 68/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-2620 CRITICAL 9.8 MITIGATE A vulnerability has been found in D-Link DAP-1620 1.03 and classified as critical
CVE-2025-2619 CRITICAL 9.8 MITIGATE A vulnerability, which was classified as critical, was found in D-Link DAP-1620 1.03
CVE-2025-2618 CRITICAL 9.8 MITIGATE A vulnerability, which was classified as critical, has been found in D-Link DAP-1620 1.03

References

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