CVE-2025-5503: A vulnerability, which was classified as critical, was found in TOTOLINK X15 1.0.0-B20230714.1105

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HIGH 8.8MITIGATE

CVE-2025-5503 is a high-severity flaw (CVSS 8.8) affecting x15 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as critical, was found in TOTOLINK X15 1.0.0-B20230714.1105. This affects the function formMapReboot of the file /boafrm/formMapReboot. The manipulation of the argument deviceMacAddr leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any w

Why this priority

High severity
EPSS top 7%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	No
Weakness	CWE-119, CWE-121, CWE-787
Published	2025-06-03
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: totolink

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

Am I affected?

Timeline

2025-06-03 15:16 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

totolink x15 firmware MITIGATE

Affected: 1.0.0-b20230714.1105

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0-b20230714.1105

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-2025-5503?

x15 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-5503 being exploited?

CVE-2025-5503 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-2025-5503 affect?

CVE-2025-5503 affects x15 firmware. Severity is high (CVSS 8.8). A vulnerability, which was classified as critical, was found in TOTOLINK X15 1.0.0-B20230714.1105. This affects the function formMapReboot of the file /boafrm/formMapReboot. The manipulation of the argument deviceMacAddr leads to stack-base

How urgent is CVE-2025-5503?

Priority 59/100. High severity; EPSS top 7%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2025-8246 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105
CVE-2025-8245 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105
CVE-2025-8244 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105
CVE-2025-8243 HIGH 8.8 MITIGATE A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical
CVE-2025-8242 HIGH 8.8 MITIGATE A vulnerability has been found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical

References

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