CVE-2025-63729: An issue was discovered in Syrotech SY-GPON-1110-WDONT SYRO_3.7L_3.1.02-240517 allowing attackers to exctract

This month

CRITICAL 9.0MITIGATE

CVE-2025-63729 is a critical-severity flaw (CVSS 9.0) affecting sy-gpon-1110-wdont firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Syrotech SY-GPON-1110-WDONT SYRO_3.7L_3.1.02-240517 allowing attackers to exctract the SSL Private Key, CA Certificate, SSL Certificate, and Client Certificates in .pem format in firmware in etc folder.

Why this priority

Critical severity
Public exploit reference

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

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-200, CWE-312, CWE-532
Published	2025-11-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: syrotech

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

Am I affected?

Timeline

2025-11-25 17:15 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

syrotech sy-gpon-1110-wdont firmware MITIGATE

Affected: 3.1.02-240517

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.02-240517

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-2025-63729?

sy-gpon-1110-wdont firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-63729 being exploited?

CVE-2025-63729 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-2025-63729 affect?

CVE-2025-63729 affects sy-gpon-1110-wdont firmware. Severity is critical (CVSS 9.0). An issue was discovered in Syrotech SY-GPON-1110-WDONT SYRO_3.7L_3.1.02-240517 allowing attackers to exctract the SSL Private Key, CA Certificate, SSL Certificate, and Client Certificates in .pem format in firmware in etc folder.

How urgent is CVE-2025-63729?

Priority 37/100. Critical severity; Public exploit reference

Related CVEs

CVE-2024-41691 MEDIUM 4.6 MITIGATE This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to storing of FTP credentials in plaintext
CVE-2024-41690 MEDIUM 4.6 MITIGATE This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to storing of default username and passwor
CVE-2024-41689 MEDIUM 4.6 MITIGATE This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to unencrypted storing of WPA/ WPS credent
CVE-2024-41688 MEDIUM 4.6 MITIGATE This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due lack of encryption in storing of usernames
CVE-2024-41687 HIGH 7.5 MITIGATE This vulnerability exists in SyroTech SY-GPON-1110-WDONT Router due to transmission of password in plain text

References

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