vuln.today: May 28, 2026 - Daily CVE Vulnerability Intelligence

THREAT ALERT

EMERGENCY CVE-2026-48027 9.3 Embedded malicious code in Nx Console (the editor extension for Nx and Lerna) version 18.95.0 turned a trusted developer tool into a trojan during a brief publish window on 19 May 2026. The poisoned build was live on the Visual Studio Marketplace for roughly 18 minutes (12:30-12:48 UTC) and on OpenVSX for roughly 36 minutes (12:33-13:09 UTC); any developer who installed or auto-updated during those windows executed attacker-controlled code inside their IDE, tagged here as information disclosure. It is confirmed actively exploited (CISA KEV) and publicly available exploit code exists, with CISA SSVC rating exploitation as active, automatable, and total technical impact; the clean release 18.100.0 is the fix. | ACT NOW CVE-2026-34926 6.7 Directory traversal in Trend Micro Apex One on-premise server (versions before 14.0.0.17079) enables a highly privileged local attacker to manipulate a key server table and inject malicious code that propagates to all managed endpoint agents, effectively weaponizing the EDR platform's own distribution infrastructure. The attack requires an adversary who has already obtained administrative credentials to the Apex One server through a separate compromise vector. No public exploit code has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the changed scope (S:C) in the CVSS vector signals that a successful exploit extends impact beyond the server itself to the entire managed agent fleet. | ACT NOW CVE-2026-48172 10.0 LiteSpeed User-End cPanel Plugin before 2.4.5 allows privilege escalation (possibly to root), as exp | ACT NOW CVE-2026-9082 6.5 SQL injection in Drupal Core across six major version branches (8.9.0 through 11.3.x) enables remote unauthenticated attackers to manipulate database queries with no required privileges or user interaction, as confirmed by CVSS vector AV:N/AC:L/PR:N/UI:N. The vulnerability yields partial confidentiality and integrity impact per CVSS - enabling data enumeration and limited data manipulation - but does not grant full database control or server compromise. No active exploitation is confirmed (not listed in CISA KEV; SSVC exploitation status: none), but SSVC flags this as automatable, making opportunistic mass scanning against the large global Drupal install base a credible near-term risk. | ACT NOW CVE-2026-41091 7.8 Local privilege escalation in Microsoft Defender (Malware Protection Engine) enables an authenticated low-privileged attacker to elevate to SYSTEM by abusing improper link resolution (CWE-59) before file access. The flaw scores CVSS 7.8 with high impact to confidentiality, integrity, and availability, and no public exploit is identified at time of analysis. Microsoft has released a patch via MSRC, and there is no current CISA KEV listing or EPSS signal indicating active mass exploitation. | ACT NOW CVE-2026-45498 4.0 Denial of service in Microsoft Defender Antimalware Platform allows a local, unprivileged attacker to partially degrade availability with low attack complexity and no user interaction required. The CVSS 4.0 score reflects limited impact - confidentiality and integrity are unaffected, and availability impact is rated Low. Vendor patch is available via Microsoft Security Response Center; no public exploit identified at time of analysis and no CISA KEV listing. | ACT NOW CVE-2026-8398 9.3 Supply chain compromise of DAEMON Tools Lite for Windows delivered trojanized installers through the legitimate vendor website daemon-tools.cc from April 8 to May 5, 2026. Attackers compromised AVB Disc Soft's build infrastructure and injected malicious code into three binaries (DTHelper.exe, DiscSoftBusServiceLite.exe, DTShellHlp.exe), all signed with the vendor's legitimate code-signing certificate. This allowed remote attackers to achieve arbitrary code execution on systems installing affected versions (12.5.0.2421 through 12.5.0.2434) with no user interaction required beyond normal installation. The legitimate digital signature bypassed security controls that rely on code-signing verification, making detection extremely difficult during the compromise window. | ACT NOW CVE-2026-42897 8.1 Cross-site scripting (XSS) in Microsoft Exchange Server enables remote attackers to spoof content and steal credentials without authentication. Affects Exchange Server 2016 CU23, 2019 CU14/CU15, and Subscription Edition. Functional exploit code exists (CVSS temporal E:F) though no active exploitation confirmed at analysis time. CVSS 8.1 (High) driven by network vector, no authentication requirement, and dual confidentiality/integrity impact. Microsoft released patches via MSRC security update guide. Medium-high priority for organizations running affected Exchange versions with webmail or OWA exposed. | EMERGENCY CVE-2026-20182 10.0 Remote unauthenticated attackers can bypass peering authentication in Cisco Catalyst SD-WAN Controller (vSmart) and SD-WAN Manager (vManage) to obtain administrative privileges and manipulate network configurations across the entire SD-WAN fabric. This critical authentication bypass (CVSS 10.0) allows direct NETCONF access as a high-privileged internal user without any credentials. Cisco released fixes in May 2026 following discovery of this second authentication flaw after a February 2026 disclosure of a related vulnerability. No active exploitation confirmed in CISA KEV at time of analysis, though the maximum CVSS score and authentication bypass nature make this a priority patching target for SD-WAN deployments. | ACT NOW CVE-2026-45321 9.6 Credential-harvesting malware compromised 84 versions of 42 TanStack npm packages on 2026-05-11 via chained GitHub Actions exploitation. Attackers combined pull_request_target misconfiguration, Actions cache poisoning, and OIDC token memory extraction to publish malicious code under the legitimate TanStack identity. Installing any affected version executes a 2.3 MB obfuscated payload that exfiltrates AWS/GCP/Kubernetes credentials, npm tokens, GitHub secrets, SSH keys, and HashiCorp Vault tokens over encrypted Session/Oxen messenger infrastructure. The payload propagates by republishing victim-maintained packages with identical injection. Socket.dev and the TanStack team confirmed the incident via GHSA-g7cv-rxg3-hmpx. No EPSS or CISA KEV data available for this recent supply-chain attack. CVSS 9.6 reflects the cross-scope credential theft impact (S:C/C:H/I:H), though exploitation requires user-initiated package installation (UI:R). | ACT NOW CVE-2026-42208 9.3 SQL injection in LiteLLM proxy server versions 1.81.16 through 1.83.6 allows unauthenticated remote attackers to read and modify database contents, gaining unauthorized access to managed LLM API credentials. The vulnerability is exploitable via crafted Authorization headers sent to any LLM API route (e.g., POST /chat/completions), triggering the injection through the proxy's error-handling path. Vendor-released patch available in version 1.83.7. No active exploitation confirmed (not in CISA KEV), but the attack vector is simple (CVSS 4.0: AV:N/AC:L/PR:N) and SQL injection POCs are widely known. Discovered by Tencent YunDing Security Lab. | ACT NOW CVE-2026-6973 7.2 Remote code execution in Ivanti Endpoint Manager Mobile (EPMM) allows authenticated administrators to execute arbitrary code on the server. Affects EPMM versions prior to 12.6.1.1, 12.7.0.1, and 12.8.0.1 through improper input validation vulnerabilities. While requiring high-privilege administrator credentials (CVSS PR:H), the vulnerability enables complete system compromise once authenticated, with high impact to confidentiality, integrity, and availability. No public exploit or active exploitation confirmed at time of analysis. | ACT NOW CVE-2026-0300 9.3 Remote code execution in Palo Alto Networks PAN-OS User-ID Authentication Portal (Captive Portal) allows unauthenticated attackers to execute arbitrary code with root privileges on PA-Series and VM-Series firewalls via specially crafted packets. CISA KEV confirms active exploitation in the wild with publicly available exploit code. EPSS risk assessment is not provided, but the vulnerability achieves maximum impact with minimal attack complexity (CVSS 9.3, AV:N/AC:L/PR:N), making this a critical priority for immediate remediation. The attack surface is significantly reduced when access to the portal is restricted to trusted internal networks per vendor best practices. | ACT NOW CVE-2026-41940 9.3 Authentication bypass in cPanel & WHM allows unauthenticated remote attackers to gain unauthorized access to the control panel by exploiting a flaw in the login flow. The vulnerability is confirmed actively exploited (CISA KEV) with publicly available exploit code, an EPSS score of 16.52% (95th percentile), and affects multiple long-term support branches of cPanel & WHM as well as WP Squared. Given that cPanel administers shared hosting environments, successful exploitation typically grants attackers control over many downstream customer sites. |

EMERGENCY CVE-2026-48027 9.3 Embedded malicious code in Nx Console (the editor extension for Nx and Lerna) version 18.95.0 turned a trusted developer tool into a trojan during a brief publish window on 19 May 2026. The poisoned build was live on the Visual Studio Marketplace for roughly 18 minutes (12:30-12:48 UTC) and on OpenVSX for roughly 36 minutes (12:33-13:09 UTC); any developer who installed or auto-updated during those windows executed attacker-controlled code inside their IDE, tagged here as information disclosure. It is confirmed actively exploited (CISA KEV) and publicly available exploit code exists, with CISA SSVC rating exploitation as active, automatable, and total technical impact; the clean release 18.100.0 is the fix. | ACT NOW CVE-2026-34926 6.7 Directory traversal in Trend Micro Apex One on-premise server (versions before 14.0.0.17079) enables a highly privileged local attacker to manipulate a key server table and inject malicious code that propagates to all managed endpoint agents, effectively weaponizing the EDR platform's own distribution infrastructure. The attack requires an adversary who has already obtained administrative credentials to the Apex One server through a separate compromise vector. No public exploit code has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the changed scope (S:C) in the CVSS vector signals that a successful exploit extends impact beyond the server itself to the entire managed agent fleet. | ACT NOW CVE-2026-48172 10.0 LiteSpeed User-End cPanel Plugin before 2.4.5 allows privilege escalation (possibly to root), as exp | ACT NOW CVE-2026-9082 6.5 SQL injection in Drupal Core across six major version branches (8.9.0 through 11.3.x) enables remote unauthenticated attackers to manipulate database queries with no required privileges or user interaction, as confirmed by CVSS vector AV:N/AC:L/PR:N/UI:N. The vulnerability yields partial confidentiality and integrity impact per CVSS - enabling data enumeration and limited data manipulation - but does not grant full database control or server compromise. No active exploitation is confirmed (not listed in CISA KEV; SSVC exploitation status: none), but SSVC flags this as automatable, making opportunistic mass scanning against the large global Drupal install base a credible near-term risk. | ACT NOW CVE-2026-41091 7.8 Local privilege escalation in Microsoft Defender (Malware Protection Engine) enables an authenticated low-privileged attacker to elevate to SYSTEM by abusing improper link resolution (CWE-59) before file access. The flaw scores CVSS 7.8 with high impact to confidentiality, integrity, and availability, and no public exploit is identified at time of analysis. Microsoft has released a patch via MSRC, and there is no current CISA KEV listing or EPSS signal indicating active mass exploitation. | ACT NOW CVE-2026-45498 4.0 Denial of service in Microsoft Defender Antimalware Platform allows a local, unprivileged attacker to partially degrade availability with low attack complexity and no user interaction required. The CVSS 4.0 score reflects limited impact - confidentiality and integrity are unaffected, and availability impact is rated Low. Vendor patch is available via Microsoft Security Response Center; no public exploit identified at time of analysis and no CISA KEV listing. | ACT NOW CVE-2026-8398 9.3 Supply chain compromise of DAEMON Tools Lite for Windows delivered trojanized installers through the legitimate vendor website daemon-tools.cc from April 8 to May 5, 2026. Attackers compromised AVB Disc Soft's build infrastructure and injected malicious code into three binaries (DTHelper.exe, DiscSoftBusServiceLite.exe, DTShellHlp.exe), all signed with the vendor's legitimate code-signing certificate. This allowed remote attackers to achieve arbitrary code execution on systems installing affected versions (12.5.0.2421 through 12.5.0.2434) with no user interaction required beyond normal installation. The legitimate digital signature bypassed security controls that rely on code-signing verification, making detection extremely difficult during the compromise window. | ACT NOW CVE-2026-42897 8.1 Cross-site scripting (XSS) in Microsoft Exchange Server enables remote attackers to spoof content and steal credentials without authentication. Affects Exchange Server 2016 CU23, 2019 CU14/CU15, and Subscription Edition. Functional exploit code exists (CVSS temporal E:F) though no active exploitation confirmed at analysis time. CVSS 8.1 (High) driven by network vector, no authentication requirement, and dual confidentiality/integrity impact. Microsoft released patches via MSRC security update guide. Medium-high priority for organizations running affected Exchange versions with webmail or OWA exposed. | EMERGENCY CVE-2026-20182 10.0 Remote unauthenticated attackers can bypass peering authentication in Cisco Catalyst SD-WAN Controller (vSmart) and SD-WAN Manager (vManage) to obtain administrative privileges and manipulate network configurations across the entire SD-WAN fabric. This critical authentication bypass (CVSS 10.0) allows direct NETCONF access as a high-privileged internal user without any credentials. Cisco released fixes in May 2026 following discovery of this second authentication flaw after a February 2026 disclosure of a related vulnerability. No active exploitation confirmed in CISA KEV at time of analysis, though the maximum CVSS score and authentication bypass nature make this a priority patching target for SD-WAN deployments. | ACT NOW CVE-2026-45321 9.6 Credential-harvesting malware compromised 84 versions of 42 TanStack npm packages on 2026-05-11 via chained GitHub Actions exploitation. Attackers combined pull_request_target misconfiguration, Actions cache poisoning, and OIDC token memory extraction to publish malicious code under the legitimate TanStack identity. Installing any affected version executes a 2.3 MB obfuscated payload that exfiltrates AWS/GCP/Kubernetes credentials, npm tokens, GitHub secrets, SSH keys, and HashiCorp Vault tokens over encrypted Session/Oxen messenger infrastructure. The payload propagates by republishing victim-maintained packages with identical injection. Socket.dev and the TanStack team confirmed the incident via GHSA-g7cv-rxg3-hmpx. No EPSS or CISA KEV data available for this recent supply-chain attack. CVSS 9.6 reflects the cross-scope credential theft impact (S:C/C:H/I:H), though exploitation requires user-initiated package installation (UI:R). | ACT NOW CVE-2026-42208 9.3 SQL injection in LiteLLM proxy server versions 1.81.16 through 1.83.6 allows unauthenticated remote attackers to read and modify database contents, gaining unauthorized access to managed LLM API credentials. The vulnerability is exploitable via crafted Authorization headers sent to any LLM API route (e.g., POST /chat/completions), triggering the injection through the proxy's error-handling path. Vendor-released patch available in version 1.83.7. No active exploitation confirmed (not in CISA KEV), but the attack vector is simple (CVSS 4.0: AV:N/AC:L/PR:N) and SQL injection POCs are widely known. Discovered by Tencent YunDing Security Lab. | ACT NOW CVE-2026-6973 7.2 Remote code execution in Ivanti Endpoint Manager Mobile (EPMM) allows authenticated administrators to execute arbitrary code on the server. Affects EPMM versions prior to 12.6.1.1, 12.7.0.1, and 12.8.0.1 through improper input validation vulnerabilities. While requiring high-privilege administrator credentials (CVSS PR:H), the vulnerability enables complete system compromise once authenticated, with high impact to confidentiality, integrity, and availability. No public exploit or active exploitation confirmed at time of analysis. | ACT NOW CVE-2026-0300 9.3 Remote code execution in Palo Alto Networks PAN-OS User-ID Authentication Portal (Captive Portal) allows unauthenticated attackers to execute arbitrary code with root privileges on PA-Series and VM-Series firewalls via specially crafted packets. CISA KEV confirms active exploitation in the wild with publicly available exploit code. EPSS risk assessment is not provided, but the vulnerability achieves maximum impact with minimal attack complexity (CVSS 9.3, AV:N/AC:L/PR:N), making this a critical priority for immediate remediation. The attack surface is significantly reduced when access to the portal is restricted to trusted internal networks per vendor best practices. | ACT NOW CVE-2026-41940 9.3 Authentication bypass in cPanel & WHM allows unauthenticated remote attackers to gain unauthorized access to the control panel by exploiting a flaw in the login flow. The vulnerability is confirmed actively exploited (CISA KEV) with publicly available exploit code, an EPSS score of 16.52% (95th percentile), and affects multiple long-term support branches of cPanel & WHM as well as WP Squared. Given that cPanel administers shared hosting environments, successful exploitation typically grants attackers control over many downstream customer sites. |

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