Cyber Brief: Samsung zero-day, Zoom patches, identity risk

Mobile and collaboration tools remain prime targets, while identity protection and state-level coordination continue to shape the risk landscape. Today’s brief focuses on a Samsung zero-day under active exploitation, fresh Zoom patches, a new phishing kit abusing redirects, a consumer identity-protection launch, and growing international cooperation. The actions below help UK organisations prioritise patching, tighten identity controls, and stay alert to shifting tactics.

Samsung mobile zero-day added to CISA’s KEV list
Security authorities have added a serious flaw in Samsung devices to the Known Exploited Vulnerabilities catalogue, signalling active abuse in the wild. The vulnerability is an out-of-bounds write in a media processing component that can enable remote code execution. In practical terms, an attacker could compromise a device by triggering image processing without a user consciously approving anything, which makes mobile endpoints an attractive initial foothold. Samsung addressed the issue earlier this year, but today’s listing means exploitation attempts are being observed, so unpatched devices are now a high-priority exposure. Organisations often allow mixed estates and bring-your-own-device arrangements, which increases the chance that vulnerable handsets are connecting to corporate services. Treat this as a time-bound risk: inventory devices, ensure patch levels are verified, and isolate anything that cannot be updated quickly. Pair technical fixes with user guidance so staff recognise signs of compromise and know the escalation path if a personal or corporate phone behaves unexpectedly.
Why it matters: UK businesses increasingly rely on mobiles for MFA, messaging, and approvals. A compromised handset can bypass controls, expose corporate apps, and undermine zero-trust assumptions, so patching and device isolation should move to the top of today’s list.
Source: Cybersecurity News

Redirect-based phishing kit targets Microsoft 365 users
A newly observed phishing kit, referred to as a “route redirect” platform, lowers the barrier for criminals to run convincing campaigns against Outlook and wider Microsoft 365 users. Rather than relying on a single malicious page, operators chain redirects to blend benign and malicious hops, making it harder for both secure email gateways and busy users to spot trouble. The kit’s templates mimic familiar login experiences, harvest credentials, and then use redirects to continue luring the victim, sometimes into approving additional prompts. Because the kit is packaged and sold to less skilled actors, the overall volume and quality of attacks can rise quickly. For defenders, this is a reminder that technical filters need to be paired with behavioural controls: conditional access, strong MFA, session risk evaluation, and continuous monitoring of sign-in anomalies. Simulated phishing that includes redirect chains helps staff practise safe habits and learn to pause when a sign-in journey feels unusual. Updating URL-rewriting and sandboxing rules to scrutinise multi-hop chains increases the chance of stopping these campaigns at the perimeter.
Why it matters: UK SMEs often rely on Microsoft 365 as their identity and collaboration backbone. Commodity phishing kits mean more convincing emails will reach inboxes, so organisations should harden identity policies today and refresh user training around redirects and multi-step prompts.
Source: Infosecurity Magazine

Zoom patches multiple issues that could expose session data
Zoom has shipped security updates for components within its Workplace stack that address vulnerabilities allowing access-control bypass and potential exposure of session information. Collaboration platforms tie together chat, meetings, file sharing, and app integrations, so a single flaw can bridge otherwise separated data. In many organisations, these tools now link into ticketing, HR, and code repositories, multiplying the potential blast radius. Applying vendor patches is the obvious first step, but configuration reviews matter just as much: confirm that audit logging is enabled, least-privilege roles are assigned, and external sharing is restricted where appropriate. Monitor for signs of anomalous session activity, including unexpected device fingerprints, unusual meeting join patterns, and sudden permission changes on channels or files. Where integrations are used, validate that tokens are rotated and scopes are minimal. If your risk appetite is low, consider a short period of heightened monitoring after patching to catch any follow-on exploitation attempts or misconfigurations.
Why it matters: UK teams run key operations through collaboration suites. Prompt patching, logging, and least-privilege checks reduce the chance that a single access-control gap becomes a data-exposure incident across multiple business functions.
Source: Cybersecurity News

Virgin Media adds consumer ‘Identity Protection’ to its security offer
Virgin Media has introduced an Identity Protection feature to its Advanced Security service, delivered with a security partner that reports detecting around 8,000,000 potential identity threats daily. While this is positioned for consumers, it reflects a wider reality for employers: the line between personal and work identities is thin, and compromised personal accounts often become stepping stones to corporate systems. For UK organisations with remote or hybrid workforces, home devices, personal email, and unmanaged mobiles are all part of the real-world threat model. Identity-theft monitoring, breach alerts, and simple hygiene such as password managers and phishing education can materially reduce risk. Employers should revisit acceptable-use and remote-working policies to clarify expectations for personal device use, and consider offering or recommending vetted consumer tools to staff in sensitive roles. Finally, align incident response with identity-centric playbooks, including rapid credential resets, access reviews, and communication templates if personal credential exposure affects corporate access.
Why it matters: Identity is the front door to most business systems. Encouraging good identity hygiene at home, alongside corporate controls, helps UK SMEs reduce account takeover, limit lateral movement, and improve resilience across mixed work environments.
Source: Virgin Media O2 Newsroom

Quad nations deepen cooperation on cyber resilience
Australia, India, Japan, and the United States are expanding collaboration on cyber capacity building, defensive coordination, and countering hostile operations. While this is a geopolitical development, it has practical implications for UK organisations linked to those markets through supply chains, technology vendors, or customers. Shared threat intelligence and coordinated responses can speed up detection of new campaigns, while alignment on standards and resilience measures often trickles into procurement language and partner expectations. UK firms may see updated contractual clauses, security questionnaires, or expectations around incident reporting and recovery testing. Preparing now by mapping dependencies, checking contract language, and validating supplier controls will reduce surprises later. If your business provides services into Quad markets, track how regulatory and assurance requirements evolve and be ready to demonstrate equivalent controls or certifications.
Why it matters: Geopolitical shifts change attacker behaviour and compliance obligations. UK organisations with Quad exposure should tighten supplier assurance and make sure their security roadmaps account for evolving cross-border expectations.
Source: 9DashLine

Today’s Key Actions

1. Prioritise mobile and collaboration patching, with device isolation for anything unpatched.
2. Tighten identity controls in Microsoft 365, enforce phishing-resistant MFA, and review conditional access.
3. Update phishing training to include redirect chains and multi-step prompts.
4. Enable and review collaboration-suite audit logs, roles, and external-sharing settings.
5. Refresh supplier-assurance checks for partners linked to Quad markets and critical services.

Secarma Insight

Tactical hygiene still wins: fast patching, strong identity, and good logging stop most real-world incidents. At the same time, resilience now spans home and office boundaries, so treat staff identity hygiene as part of your control set. Finally, watch the regulatory ripple effects of international cooperation; they often materialise as new procurement and assurance expectations. If you want help prioritising actions or mapping supply-chain dependencies, our team can guide you.

Get in touch with us to prioritise your next steps and strengthen your security posture.