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CVE-2026-7598

📛 CVE Title

libssh2 userauth.c userauth_password integer overflow

⬇ Download JSON ⚠ View as Threat

Description

A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

Overview

State
PUBLISHED
Assigner (CNA)
VulDB
CVSS severity
MEDIUM
CVSS score
CVSS 6.9 / 10 6.9 6.9 / 10
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
Effective score
6.9 / 10 MEDIUM source: CNA overview
MSRC score
7.3 / 10 HIGH MS rating: Moderate
CWE(s)
CWE-190, CWE-189
Reserved
2026-05-01
Published
2026-05-01 23:30 UTC
Last updated
2026-05-04 15:31 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/7xxx/CVE-2026-7598.json
Linked Threat
CVE-2026-7598 — CVE-2026-7598

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-01 22:16:16 UTC
NVD last modified
2026-05-07 01:47:08 UTC
NVD CVSS v3.1
CVSS 7.3 / 10 7.3 7.3 / 10 HIGH source: cna@vuldb.com
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Exploitability subscore
3.9 / 10
Impact subscore
3.4 / 10
EPSS score
0.0007 (probability of exploitation in next 30 days)
EPSS percentile
21.13% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 06:39 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-26722
Assigner
VulDB
Published
May 1, 2026, 9:30:11 PM
Updated
May 4, 2026, 1:31:37 PM
EUVD base score (CVSS 4.0)
6.9 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
EUVD-reported EPSS
0.0700
Vendors
n/a
Products
libssh2 (1.11.1)
libssh2 (1.11.0)

ENISA description: A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the file src/userauth.c. Such manipulation of the argument username_len/password_len leads to integer overflow. The attack may be launched remotely. The name of the patch is 256d04b60d80bf1190e96b0ad1e91b2174d744b1. A patch should be applied to remediate this issue.

EUVD references (6)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-08-15 03:01 UTC (source: CVRF).

MS severity
Moderate
MS CVSS base score
7.3 / 10 (temporal 7.0)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
Release
2026-May
Microsoft remediations / KB articles (2)

Affected products (1)
VendorProductVersionsPlatforms
n/a libssh2 1.11.0 (affected), 1.11.1 (affected) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

Vendor references (6)

References embedded in the original CVE record by the assigning CNA.

Web references (11)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (7)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • CISA Warns of Exploited Microsoft Defender 0-Day Flaws
    web:cyberpress.org

    The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

    2026-05-23 20:47 UTC
  • Microsoft September 2025 Patch Tuesday - 81 Vulnerabilities ... - GBHackers
    web:gbhackers.com

    Microsoft has released its September 2025 Patch Tuesday update, addressing a total of 81 security vulnerabilities across its product portfolio.

    2026-05-23 20:47 UTC
  • Microsoft Patch Tuesday, September 2025 Edition - Krebs on Security
    web:krebsonsecurity.com

    Microsoft Corp. today issued security updates to fix more than 80 vulnerabilities in its Windows operating systems and software. There are no known "zero-day" or actively exploited ...

    2026-05-23 20:47 UTC
  • Nvd - Cve-2026-7598
    web:nvd.nist.gov

    An official website of the United States government Here's how you know

    2026-05-23 20:47 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-05-23 20:47 UTC
  • Windows Server emergency patches fix WSUS bug with PoC exploit
    web:www.bleepingcomputer.com

    Microsoft has released out-of-band (OOB) security updates to patch a critical-severity Windows Server Update Service (WSUS) vulnerability with publicly available proof-of-concept exploit code.

    2026-05-23 20:47 UTC
  • ArcGIS Server Security 2025 Update 2 Patch - Esri
    web:www.esri.com

    Key highlights The ArcGIS Server Security 2025 update 2 is available This patch resolves 10 Medium severity vulnerabilities This security patch is cumulative, and includes fixes provided in the ArcGIS Server Security 2025 update 1.

    2026-05-23 20:47 UTC
  • CVE-2026-7598 Common Vulnerabilities and Exposures | SUSE
    web:www.suse.com

    Secure your Linux systems from CVE-2026-7598 . Stay ahead of potential threats with the latest security updates from SUSE.

    2026-05-23 20:47 UTC
  • CVE-2026-7598 - High Vulnerability - TheHackerWire
    web:www.thehackerwire.com

    CVE-2026-7598 is a High severity vulnerability (CVSS 7.3). A security vulnerability has been detected in libssh2 up to 1.11.1. The impacted element is the function userauth_password of the...

    2026-05-23 20:47 UTC
  • Patch Tuesday May 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-05-23 20:47 UTC
  • Security Updates - Red Hat Customer Portal
    web:access.redhat.com

    Learn about our open source products, services, and company. You are here

    2026-06-03 07:49 UTC
  • Mitigate RedSun Zero-Day Without A Patch | Qualys
    web:blog.qualys.com

    Key Takeaways RedSun is a critical zero-day vulnerability in Microsoft Defender that allows low-privileged users to gain SYSTEM access No patch is currently available, leaving all Defender-enabled Windows systems potentially exposed Qualys VMDR detects affected assets instantly (QID 92382) TruRisk™ Eliminate enables immediate mitigation , removing exploitability without waiting for a fix ...

    2026-06-03 07:49 UTC
  • ‎Google Gemini
    web:gemini.google.com

    Meet Gemini, Google's AI assistant. Get help with writing, planning, brainstorming, and more. Experience the power of generative AI.

    2026-06-03 07:49 UTC
  • Patch Compliance and Remediation: Technical Guide for IT Pros - JumpCloud
    web:jumpcloud.com

    Master patch compliance with this technical guide covering vulnerability scanning, deployment processes, key metrics, and remediation best practices.

    2026-06-03 07:49 UTC
  • NVD - Home
    web:nvd.nist.gov

    The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...

    2026-06-03 07:49 UTC
  • Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
    web:support.servicenow.com

    Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

    2026-06-03 07:49 UTC
  • 700+ education and tech websites hijacked in huge ClickFix malware ...
    web:www.malwarebytes.com

    Attackers are abusing a critical Ghost Content Management System (CMS) vulnerability to hijack more than 700 legitimate websites and inject a fake Cloudflare verification step that tricks visitors into running a Windows command that installs malware. These social engineering campaigns—where website visitors are tricked into running malicious commands on their systems—are commonly known as ...

    2026-06-03 07:49 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-06-03 07:49 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-7598.json.

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                "id": "CVE-2026-7598",
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