CVE-2026-76591

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

1.32% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 68.6% 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:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/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 2026-08-21.

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

2026-08-19 22:00Z15 DAYS AGO

Last updated

2026-08-21 21:47Z13 DAYS AGO

Reserved

2026-08-19

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.2

Document digest

f56cc361a959b92c0fc1fa2da93aef13f3605e76a74aec6c444a121084595543

• vuldb.comVDB-393088 | TRENDnet TEW-755AP ssi email.cgi log_email_server command injectionhttps://vuldb.com/vuln/393088vdb-entrytechnical-description
• vuldb.comVDB-393088 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/393088/ctisignaturepermissions-required
• vuldb.comCVE-2026-76591 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-76591third-party-advisory
• vuldb.comSubmit #877853 | TRENDnet TEW-755AP TEW-755AP Command Injectionhttps://vuldb.com/submit/877853third-party-advisory
• github.comhttps://github.com/meishigana/CVE/tree/main/team15_20260702/14_755ap-ssi-cmdirelated
• github.comhttps://github.com/meishigana/CVE/blob/main/team15_20260702/14_755ap-ssi-cmdi/poc/poc-ssi-injection.pyexploit