Morning Brief — 2026-08-03

4 material breach disclosures, 1 exploit probability movers, 10 emerging critical cves, 24 ransomware activity, 2351 ioc volume, 12 active malware families, 14 multi-source iocs, 4 intel feeds, 5 hand-authored sigma, and 17 detection gaps. Sections with no signal are still rendered with an explicit “none in this window” note so absence is visible alongside presence.

Material Breach Disclosures

AMGEN INC (AMGN)

• Filed: 2026-07-31 · CIK 0000318154 · Accession 0000318154-26-000119
• Filing: https://www.sec.gov/Archives/edgar/data/318154/000031815426000119/amgn-20260729.htm

The Company has since learned that some of its data, including proprietary data, patient protected health information, and other information, has been exfiltrated from these cloud environments. To date, the Company has not identified any impact to its products, manufacturing operations, or financial reporting systems, or to the Company’s ability to meet patient needs. The investigation remains ong…

River Financial Corp (RVRF)

• Filed: 2026-07-30 · CIK 0001641601 · Accession 0001193125-26-325324
• Filing: https://www.sec.gov/Archives/edgar/data/1641601/000119312526325324/ck0001641601-20260619.htm

Since the date of the original filing, River’s investigation has progressed. River has determined that an unauthorized threat actor accessed portions of its network and removed certain data from its environment. River is working to determine the nature and scope of the information involved, including whether any personally identifiable information was affected. As part of its response, River took…

UPBOUND GROUP, INC. (UPBD)

• Filed: 2026-07-22 · CIK 0000933036 · Accession 0001193125-26-310605
• Filing: https://www.sec.gov/Archives/edgar/data/933036/000119312526310605/upbd-20260721.htm

Caution Concerning Forward-Looking Statements

This Current Report on Form 8-K contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve risks and uncertainties, including statements regarding our understanding of the event and its potential impacts. Factors that could cause or contribute to material…

CID Holdco, Inc. (DAIC)

• Filed: 2026-07-22 · CIK 0002033770 · Accession 0001213900-26-080208
• Filing: https://www.sec.gov/Archives/edgar/data/2033770/000121390026080208/ea029882601ex10-1.htm

any written notice from any governmental authority alleging any material violation of applicable cybersecurity or data privacy laws that remains unresolved. To the Company’s knowledge, there are no pending or threatened claims, investigations or proceedings by any governmental authority relating to any material cybersecurity incident or any material violation of applicable cybersecurity or d…

Federal Patching Priority

No new KEV additions in this window.

Exploit Probability Movers

Emerging Critical CVEs

• CVE-2026-18589 · CRITICAL (9.8) · 2026-08-03 — A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The atta…
• CVE-2026-18588 · CRITICAL (9.8) · 2026-08-03 — A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote explo…
• CVE-2026-65321 · CRITICAL (9.8) · 2026-08-02 — PyAthena prior to 3.35.4 contains a sql injection vulnerability that allows unauthenticated attackers to inject arbitrary SQL by exploiting improper quote-escaping in DefaultParameterFormatter.format(), which routes DELE…
• CVE-2026-68579 · CRITICAL (9.6) · 2026-08-02 — FreeRDP before 3.30.0 (<= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client’s CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IS…
• CVE-2026-67356 · HIGH (8.8) · 2026-08-02 — ArcadeDB before 26.7.3 binds the real LocalDatabase object into JavaScript trigger contexts with HostAccess.ALL, allowing schema-admins to call getSecurity().createUser() without permission checks. Attackers with UPDATE_…
• CVE-2025-71399 · HIGH (8.6) · 2026-08-02 — Better Auth relies on better-call, which uses the rou3 router library. In affected versions of rou3, paths are normalized by removing empty segments, so /path, //path, and ///path resolve to the same route. In Better Aut…
• CVE-2026-68581 · HIGH (8.1) · 2026-08-02 — Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID()…
• CVE-2026-21555 · HIGH (7.5) · 2026-08-03 — In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed
• CVE-2026-21554 · HIGH (7.5) · 2026-08-03 — In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed
• CVE-2026-21553 · HIGH (7.5) · 2026-08-03 — In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed

Supply Chain

No high/critical GHSA advisories in this window.

Ransomware Activity

24 new victim postings across 7 groups.

IOC Volume

2351 new IOCs in this window. By source:

Recent OSINT Events

No curated MISP events in this window (bulk-IOC contributions tallied in IOC Volume).

Active Malware Families

12 malware families active this week (1 corroborated across ≥2 sources), exercising 15 ATT&CK techniques. Family is the unit, not the indicator: the raw IOCs are drill-down evidence below, not the signal.

Families marked ”→” are delivery/social-engineering clusters (ClickFix). Their technique mappings are the delivery chain — downstream behavior is payload-dependent, so they don’t open a hard coverage gap on their own.

Multi-Source IOCs

14 IOCs flagged by 2+ independent sources this window — the highest-confidence signal the cross-feed corpus produces.

MISP × KEV Correlation

No MISP events in this window referenced a CVE.

Cross-Reference

No SEC × KEV vendor token matches in this window. (This is a heuristic surface, absence is expected most days.)

Intel Feeds

4 IOC feeds updated this run (8,662 indicators total) — each available as CSV, MISP JSON, and STIX 2.1. Subscribe at https://thrunt.me/intel/manifest.json.

Hand-Authored Sigma

3 production-ready TTP rules (+2 scaffolds in the authoring queue) live at https://thrunt.me/sigma/manifest.json. Subscribe via https://thrunt.me/sigma/rules.lock.json (content-hash churn) or pull all with https://thrunt.me/sigma/rules.tar.gz.

Detection Gaps

17 of 155 techniques with corpus signal have zero detection coverage — no SigmaHQ community rule, no thrunt rule. This is the hand-authoring queue; the live view is at https://thrunt.me/corpus/attck/.

…and 7 more below the cut — full list on the rollup.

Pipeline Health

All feeds healthy.

Sources: SEC EDGAR (public domain), CISA Known Exploited Vulnerabilities (public domain), FIRST.org EPSS (per ToS), NIST NVD (public domain), GitHub Security Advisories (per ToS), abuse.ch URLhaus (CC0, attribution), ransomware.live (per ToS), MITRE ATT&CK (CC BY 4.0).

Published by Applied Cybernetics Group via thrunt.me. Heuristic cross-references are labelled as such; verify before action.