How severe is CVE-2025-8243?

CVE-2025-8243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-8243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8243?

CVE-2025-8243 affects Totolink X15 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8243?

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

Does CVE-2025-8243 have an EU (EUVD) identifier?

Yes. CVE-2025-8243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22834.

When was CVE-2025-8243 published?

CVE-2025-8243 was published on 2025-07-27 and last updated on 2026-06-17.

CVE-2025-8243

CVE-2025-8243 is a high-severity vulnerability in Totolink X15 Firmware with a CVSS 3.x base score of 8.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22834
Weakness: CWE-787
Affected product: Totolink X15 Firmware
Published: 2025-07-27
Last modified: 2026-06-17

Description

A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical. This issue affects some unknown processing of the file /boafrm/formMapDel of the component HTTP POST Request Handler. The manipulation of the argument devicemac1 leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-8243?: A vulnerability was found in TOTOLINK X15 1.0.0-B20230714.1105 and classified as critical. This issue affects some unknown processing of the file /boafrm/formMapDel of the component HTTP POST Request Handler. The manipulation of the argument devicemac1 leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-8243?: CVE-2025-8243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-8243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8243?: CVE-2025-8243 affects Totolink X15 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-8243 have an EU (EUVD) identifier?: Yes. CVE-2025-8243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22834.
When was CVE-2025-8243 published?: CVE-2025-8243 was published on 2025-07-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:x15_firmware:1.0.0-b20230714.1105:*:*:*:*:*:*:*

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