How severe is CVE-2025-57623?

CVE-2025-57623 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-57623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-57623?

CVE-2025-57623 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-57623?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-57623 have an EU (EUVD) identifier?

Yes. CVE-2025-57623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31145.

When was CVE-2025-57623 published?

CVE-2025-57623 was published on 2025-09-25 and last updated on 2026-06-17.

CVE-2025-57623

CVE-2025-57623 is a medium-severity vulnerability in Totolink N600r Firmware with a CVSS 3.x base score of 5.3. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31145
Weakness: CWE-476
Affected product: Totolink N600r Firmware
Published: 2025-09-25
Last modified: 2026-06-17

Description

A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service.

Frequently asked questions

What is CVE-2025-57623?: A NULL pointer dereference in TOTOLINK N600R firmware v4.3.0cu.7866_B2022506 allows attackers to cause a Denial of Service.
How severe is CVE-2025-57623?: CVE-2025-57623 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-57623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-57623?: CVE-2025-57623 affects Totolink N600r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-57623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-57623 have an EU (EUVD) identifier?: Yes. CVE-2025-57623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31145.
When was CVE-2025-57623 published?: CVE-2025-57623 was published on 2025-09-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:n600r_firmware:4.3.0cu.7866_b2022506:*:*:*:*:*:*:*

More vulnerabilities in Totolink N600r Firmware

CVE-2025-51390 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection vulnerability via the pin…
CVE-2025-46060 — Critical (CVSS 9.8): Buffer Overflow vulnerability in TOTOLINK N600R v4.3.0cu.7866_B2022506 allows a remote attacker to execute arbitrary…
CVE-2025-22900 — Critical (CVSS 9.8): Totolink N600R v4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the macCloneMac parameter in the…
CVE-2023-43141 — Critical (CVSS 9.8): TOTOLINK A3700R V9.1.2u.6134_B20201202 and N600R V5.3c.5137 are vulnerable to Incorrect Access Control.
CVE-2022-29399 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the url parameter in the function…
CVE-2022-29398 — Critical (CVSS 9.8): TOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the File parameter in the…

All CVEs affecting Totolink N600r Firmware →

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