How severe is CVE-2025-62526?

CVE-2025-62526 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2025-62526 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-62526?

CVE-2025-62526 affects Openwrt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-62526?

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-2025-62526 have an EU (EUVD) identifier?

Yes. CVE-2025-62526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35591.

When was CVE-2025-62526 published?

CVE-2025-62526 was published on 2025-10-22 and last updated on 2026-06-17.

CVE-2025-62526

CVE-2025-62526 is a high-severity vulnerability in Openwrt with a CVSS 3.x base score of 7.9. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.9)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35591
Weakness: CWE-122
Affected product: Openwrt
Published: 2025-10-22
Last modified: 2026-06-17

Description

OpenWrt Project is a Linux operating system targeting embedded devices. Prior to version 24.10.4, ubusd contains a heap buffer overflow in the event registration parsing code. This allows an attacker to modify the head and potentially execute arbitrary code in the context of the ubus daemon. The affected code is executed before running the ACL checks, all ubus clients are able to send such messages. In addition to the heap corruption, the crafted subscription also results in a bypass of the listen ACL. This is fixed in OpenWrt 24.10.4. There are no workarounds.

Frequently asked questions

What is CVE-2025-62526?: OpenWrt Project is a Linux operating system targeting embedded devices. Prior to version 24.10.4, ubusd contains a heap buffer overflow in the event registration parsing code. This allows an attacker to modify the head and potentially execute arbitrary code in the context of the ubus daemon. The affected code is executed before running the ACL checks, all ubus clients are able to send such messages. In addition to the heap corruption, the crafted subscription also results in a bypass of the listen ACL. This is fixed in OpenWrt 24.10.4. There are no workarounds.
How severe is CVE-2025-62526?: CVE-2025-62526 has a CVSS 3.x base score of 7.9, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2025-62526 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-62526?: CVE-2025-62526 affects Openwrt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-62526?: 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-2025-62526 have an EU (EUVD) identifier?: Yes. CVE-2025-62526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35591.
When was CVE-2025-62526 published?: CVE-2025-62526 was published on 2025-10-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*

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