Security readout for executives and security teams
Plain-English summary
A stored cross-site scripting flaw affects Thales Sentinel LDK Runtime on Windows before version 10.22. Malicious content could be saved and later rendered by Sentinel ACC, affecting information and making unauthorized changes in the application context. Availability impact is not reported.
Executive priority
Prioritize remediation in the normal high-severity cycle, accelerating systems accessible to untrusted local users or hosting sensitive licensing operations. Confirm ownership and upgrade status promptly. Current evidence supports meaningful integrity risk but not emergency treatment based on known active exploitation.
Technical view
CVE-2026-3457 is a CWE-79 stored XSS caused by improper neutralization during web-page generation. CVSS 4.0 scores it 7.0 with local access, low complexity, no privileges, and no user interaction. The supplied sources do not identify the vulnerable input, storage path, or execution context.
Likely exposure
Windows systems running Sentinel LDK Runtime versions earlier than 10.22 are potentially exposed. The supplied record defaults other versions to unaffected, but organizations should verify installed versions and applicability against Thales guidance.
Exploitation context
The CVSS vector records proof-of-concept exploit maturity. The CVE is not listed as CISA KEV in the supplied bundle, and no cited evidence establishes active exploitation. Required local access limits remote exposure but does not eliminate insider or compromised-host risk.
Researcher notes
The record establishes stored XSS, Windows scope, affected versions before 10.22, and CVSS 4.0 impact metrics. It does not describe the injection surface, stored object, privilege boundary, affected ACC component versions, detection indicators, or attack observations. Those details require the vendor advisory or further authoritative disclosure.
Mitigation direction
- Upgrade Sentinel LDK Runtime to version 10.22 or later where supported.
- Confirm the required release and deployment instructions in the Thales advisory.
- Restrict access to affected Windows systems while remediation is pending.
- Apply compensating controls according to vendor guidance if immediate upgrading is unavailable.
Validation and detection
- Inventory Windows systems containing Sentinel LDK Runtime and record their versions.
- Confirm every affected installation is version 10.22 or later after remediation.
- Review the Thales advisory for product-specific verification or detection guidance.
- Document exceptions where an affected version remains and confirm compensating controls.
- Treat active-exploitation conclusions as unverified unless supported by additional authoritative evidence.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-3457 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:P
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:P——THA-PSIRTCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N2.54.2THA-PSIRTVulnerability scoring details
Base CVSS 4.0 score
7HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N/E:P
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=5c18186b478aa950128dca72e36d4391&sysparm_article=KB0027106CVE reference, THA-PSIRT · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.