CVE-2026-55200

highpriority · track · 44EPSS 0.039 · 90 %ileexploit · PoCDEEUFRNLRUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
3 exploits · PoC
Likely / severe?
3.88% (90th) EPSS
CVSS 8.3 · high
Is it mine?
14 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

libssh2 1.11.1, fixed in commit 97acf3d, contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.

01

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Lprimary · NVD / NIST USexploitability 2.8 · impact 5.5
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · disclosure@vulncheck.comexploitability 2.2 · impact 5.9
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · NCSC-NL NL
v4.09.2criticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · disclosure@vulncheck.com
v4.09.2criticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.08.2highCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-680USCWE-680USCWE-680US
04

exploits (3)

Public proof-of-concept and weaponised exploit code.

05

affected products (14)

Products and version ranges known to be affected.

06

advisories (6)

Vendor and ecosystem advisories describing this.

  • NCSC-2026-0210Kwetsbaarheden verholpen in libssh2 door libsshNL2026-06-23csaf · ncsc_nlNL

    libssh heeft kwetsbaarheden verholpen in libssh2 tot en met versie 1.11.1.

  • NCSC-2026-0439Kwetsbaarheden verholpen in Oracle PeopleSoft Enterprise NL2026-10-21csaf · ncsc_nlNL

    Oracle heeft nieuwe kwetsbaarheden verholpen in Oracle PeopleSoft Enterprise.

  • WID-SEC-W-2026-1996libssh2: Mehrere SchwachstellenDeutsch2026-06-17csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in libssh2 ausnutzen, um einen Denial of Service Angriff durchzuführen oder Code auszuführen.

  • WID-SEC-W-2026-4082Oracle PeopleSoft: Mehrere SchwachstellenDeutsch2026-10-20csaf · cert_bundDE

    Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle PeopleSoft ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

  • CERTFR-2026-AVI-1352Multiples vulnérabilités dans Oracle PeopleSoftFrançais2026-10-21vendor · certfrFR
  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundncsc_nlnvdcertfrNVDCVE.orgMITRE
published 2026-06-17modified 2026-10-22
09

references (10)

External citations — patches, advisories, analysis.

scry

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