CVE-2025-63457: Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the wanMTU parameter in the sub_4F55C fu

This week

HIGH 7.5REMOTEMITIGATE

CVE-2025-63457 is a high-severity flaw (CVSS 7.5) affecting ax1803 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the wanMTU parameter in the sub_4F55C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Why this priority

High severity
Public exploit reference
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-787, CWE-121
Published	2025-11-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tenda

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

Am I affected?

Timeline

2025-11-10 17:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

tenda ax1803 firmware MITIGATE

Affected: 1.0.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0.1

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-2025-63457?

ax1803 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63457 being exploited?

CVE-2025-63457 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-2025-63457 affect?

CVE-2025-63457 affects ax1803 firmware. Severity is high (CVSS 7.5). Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the wanMTU parameter in the sub_4F55C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

How urgent is CVE-2025-63457?

Priority 45/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-1329 HIGH 8.8 MITIGATE A flaw has been found in Tenda AX1803 1.0.0.1
CVE-2025-7598 HIGH 8.8 MITIGATE A vulnerability classified as critical was found in Tenda AX1803 1.0.0.1
CVE-2025-7597 HIGH 8.8 MITIGATE A vulnerability classified as critical has been found in Tenda AX1803 1.0.0.1
CVE-2025-70651 HIGH 7.5 MITIGATE Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow in the ssid parameter of the form_fast_setti
CVE-2025-70648 HIGH 7.5 MITIGATE Tenda AX1803 v1.0.0.1 was discovered to contain a stack overflow in the security_5g parameter of the sub_727F4

References

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