CVE-2025-45059: D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the fn parameter in the tgfile_htm

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HIGH 7.5REMOTEMITIGATE

CVE-2025-45059 is a high-severity flaw (CVSS 7.5) affecting di-8300 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the fn parameter in the tgfile_htm function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): MITRE · Vendor: dlink

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 18:24 UTCPublished CVE record published
2026-07-25 10:10 UTCUpdated Record last modified

dlink di-8300 firmware MITIGATE

Affected: 16.07.26a1

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.07.26a1

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.

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-2025-45059?

di-8300 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-45059 being exploited?

CVE-2025-45059 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-2025-45059 affect?

CVE-2025-45059 affects di-8300 firmware. Severity is high (CVSS 7.5). D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the fn parameter in the tgfile_htm function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.

How urgent is CVE-2025-45059?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-45057 HIGH 7.5 MITIGATE D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the ip parameter in the ip_position
CVE-2025-45058 HIGH 7.5 MITIGATE D-Link DI-8300 v16.07.26A1 was discovered to contain a buffer overflow via the fx parameter in the jingx_asp f

References

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