CVE-2026-15105

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.37% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 31.4% of scored records. A rank, not a probability.

NVD base score

2.1 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-25.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-08 22:15Z3 MO AGO

Last updated

2026-08-01 14:56Z2 MO AGO

Reserved

2026-07-08

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

3e31df15ce8c877cac25e03a37f952b63b0d6567dcb0ee77e0631071c3328868

• vuldb.comVDB-376946 | davenardella snap7 ReadVar Request s7_server.cpp PerformFunctionRead out-of-bounds writehttps://vuldb.com/vuln/376946vdb-entrytechnical-description
• vuldb.comVDB-376946 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/376946/ctisignaturepermissions-required
• vuldb.comCVE-2026-15105 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-15105third-party-advisory
• vuldb.comSubmit #851026 | Davide Nardella Snap7 master(commit:30f37da3114024a71ba93f7fd855c680b97a406f) Stack-based Buffer Overflowhttps://vuldb.com/submit/851026third-party-advisory
• github.comhttps://github.com/davenardella/snap7/issues/16issue-tracking
• github.comhttps://github.com/user-attachments/files/28681740/poc.zipexploit
• github.comhttps://github.com/davenardella/snap7/product