6.5

CVE-2025-57785: hiawatha hiawatha web server Double Free

CVSS: 6.5v3.1MediumAnalyzed
Published 26-01-2026Last modified 26-01-2026
Open JSON

Vulnerability summary

CVE-2025-57785 is a medium (CVSS 6.5) Double Free vulnerability in hiawatha hiawatha web server. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-01-2026
    PublishedVulnerability first disclosed.
  2. 26-01-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.01 pp

From 0.36% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Hiawatha1 product
Hiawatha.leisink1 product

2 vendors · 2 products

References

1 links