How severe is CVE-2025-63729?

CVE-2025-63729 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-63729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63729?

CVE-2025-63729 affects Syrotech Sy-gpon-1110-wdont Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63729?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-63729 have an EU (EUVD) identifier?

Yes. CVE-2025-63729 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199605.

When was CVE-2025-63729 published?

CVE-2025-63729 was published on 2025-11-25 and last updated on 2026-06-17.

CVE-2025-63729

CVE-2025-63729 is a critical-severity vulnerability in Syrotech Sy-gpon-1110-wdont Firmware with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199605
Weakness: CWE-200
Affected product: Syrotech Sy-gpon-1110-wdont Firmware
Published: 2025-11-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-63729?: 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 severe is CVE-2025-63729?: CVE-2025-63729 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-63729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63729?: CVE-2025-63729 affects Syrotech Sy-gpon-1110-wdont Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63729?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-63729 have an EU (EUVD) identifier?: Yes. CVE-2025-63729 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199605.
When was CVE-2025-63729 published?: CVE-2025-63729 was published on 2025-11-25 and last updated on 2026-06-17.

References

https://github.com/Yashodhanvivek/CVE-2025-63729-Syrotech-SY-GPON-1110-/blob/main/Syrotech_SY-GPON-1110-WDONT_Security_Assessment.pdf

Affected products (1)

cpe:2.3:o:syrotech:sy-gpon-1110-wdont_firmware:3.1.02-240517:*:*:*:*:*:*:*

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