CVE-2025-4878

LOWPre-NVD 3.63.6—
EchelonGraph scoreMEDIUM confidence

Score 3.6 from GitHub Security Advisory (severity: LOW) published 2025-07-22. a secondary CVSS source baseline 3.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
3.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.6Exploit: NoneExposed: 0

A fix is available — apply it.

A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.

CVSS v3
3.6
EG Score
3.6(medium)
EG Risk
16(Track)
EG Risk 16/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity36% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
7.9%
KEV
Not listed

Published

July 22, 2025

Last Modified

June 30, 2026

References (6)

Vendor Advisories for CVE-2025-4878(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibssh-gcrypt-dev (0.10.6-3ubuntu1.1) @ oracular2026-05-21ubuntu
ubuntulibssh-gcrypt-dev (0.6.3-4.3ubuntu0.6+esm2) @ xenial2026-05-21ubuntu
redhatlibssh-0:0.10.4-18.el92026-05-19redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 128 total refreshes for this CVE.

  1. 2026-07-23 14:18 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2025-4878?
CVE-2025-4878 is a low vulnerability published on July 22, 2025. A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekeyfromfile() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption.
When was CVE-2025-4878 disclosed?
CVE-2025-4878 was first published in the National Vulnerability Database on July 22, 2025, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-4878 actively exploited?
CVE-2025-4878 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-4878?
CVE-2025-4878 has a CVSS v3 base score of 3.6 (NVD).
How do I remediate CVE-2025-4878?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-4878, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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