How severe is CVE-2025-57785?

CVE-2025-57785 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-57785 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-57785?

CVE-2025-57785 affects Hiawatha.leisink Hiawatha Webserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-57785?

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

Does CVE-2025-57785 have an EU (EUVD) identifier?

Yes. CVE-2025-57785 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206341.

When was CVE-2025-57785 published?

CVE-2025-57785 was published on 2026-01-26 and last updated on 2026-06-17.

CVE-2025-57785

CVE-2025-57785 is a medium-severity vulnerability in Hiawatha.leisink Hiawatha Webserver with a CVSS 3.x base score of 6.5. 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-415.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206341
Weakness: CWE-415
Affected product: Hiawatha.leisink Hiawatha Webserver
Published: 2026-01-26
Last modified: 2026-06-17

Description

A Double Free in XSLT `show_index` has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to corrupt data which may lead to arbitrary code execution.

Frequently asked questions

What is CVE-2025-57785?: A Double Free in XSLT `show_index` has been identified in Hiawatha webserver version 11.7 which allows an unauthenticated attacker to corrupt data which may lead to arbitrary code execution.
How severe is CVE-2025-57785?: CVE-2025-57785 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-57785 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-57785?: CVE-2025-57785 affects Hiawatha.leisink Hiawatha Webserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-57785?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-57785 have an EU (EUVD) identifier?: Yes. CVE-2025-57785 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206341.
When was CVE-2025-57785 published?: CVE-2025-57785 was published on 2026-01-26 and last updated on 2026-06-17.

References

https://gitlab.com/hsleisink/hiawatha/-/blame/master/src/xslt.c?ref_type=heads#L675

Affected products (1)

cpe:2.3:a:hiawatha.leisink:hiawatha_webserver:11.7:*:*:*:*:*:*:*

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