Latest cybersecurity reporting from selected sources.

CISA confirms BlueHammer (CVE-2026-33825) is now used in ransomware attacks to gain SYSTEM privileges through Microsoft Defender. BlueHammer, tracked as CVE-2026-33825, has moved from proof-of-concept noise to real ransomware attacks in the wild, the US CISA confirms. BlueHammer allows attackers to escalate privileges locally in Microsoft Defender. The vulnerability, along with two other zero-days dubbed […]

A public proof-of-concept is now out for CVE-2026-55200, a critical flaw in libssh2 that lets a malicious or compromised SSH server trigger memory corruption on a connecting client, with possible code execution. No credentials, no user interaction. The bug affects every release up to and including 1.11.1 and carries a CVSS 4.0 score of 9.2

Cisco has patched a bug in Unified Communications Manager that lets an unauthenticated attacker on the network write files to the box and, from there, climb to root

Cisco patched a critical Unified CM flaw with public PoC code that allows unauthenticated attackers to launch SSRF attacks remotely. Cisco has addressed a high-severity vulnerability, tracked as CVE-2026-20230, affecting Unified CM and Unified CM SME. The flaw, caused by improper validation of certain HTTP requests, allows a remote attacker without authentication to perform server-side […]

Proof-of-concept (PoC) exploit code has now been released for a recently patched security flaw in the Linux kernel that could allow for local privilege escalation (LPE)

The critical CVE-2026-41940 authentication bypass vulnerability in cPanel, WHM, and WP Squared is being actively exploited in the wild and has been leveraged in attempts since late February. [...]

As exploitation activity against CVE-2025-55182 ramps up, researchers are finding some proof-of-concept exploits contain bypasses for web application firewall (WAF) rules.

CVE-2025-55182 is a CVSS 10.0 pre-authentication RCE affecting React Server Components. Amid the flood of fake proof-of-concept exploits, scanners, exploits, and widespread misconceptions, this technical analysis intends to cut through the noise.

Oracle has silently fixed an Oracle E-Business Suite vulnerability (CVE-2025-61884) that was actively exploited to breach servers, with a proof-of-concept exploit publicly leaked by the ShinyHunters extortion group. [...]

Oracle has silently fixed an Oracle E-Business Suite vulnerability (CVE-2025-61884) that was actively exploited to breach servers, with a proof-of-concept exploit publicly leaked by the ShinyHunters extortion group. [...]

A critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed "CitrixBleed 2," was actively exploited nearly two weeks before proof-of-concept (PoC) exploits were made public, despite Citrix stating that there was no evidence of attacks. [...]

Researchers have released proof-of-concept (PoC) exploits for a critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed CitrixBleed2, warning that the flaw is easily exploitable and can successfully steal user session tokens. [...]

A proof-of-concept exploit has been publicly released for a maximum severity Apache Parquet vulnerability, tracked as CVE-2025-30065, making it easy to find vulnerable servers. [...]

Roses are red, violets are blue, CVE-2024-53704 is perfect for a ransomware crew Miscreants are actively abusing a high-severity authentication bypass bug in unpatched internet-facing SonicWall firewalls following the public release of proof-of-concept exploit code.…

A deceptive proof-of-concept (PoC) exploit for CVE-2024-49113 (aka "LDAPNightmare") on GitHub infects users with infostealer malware that exfiltrates sensitive data to an external FTP server. [...]

Our blog entry discusses a fake PoC exploit for LDAPNightmare (CVE-2024-49113) that is being used to distribute information-stealing malware

A recently patched critical Apache Struts 2 vulnerability tracked as CVE-2024-53677 is actively exploited using public proof-of-concept exploits to find vulnerable devices. [...]

A proof-of-concept (PoC) exploit for CVE-2024-29847, a critical remote code execution (RCE) vulnerability in Ivanti Endpoint Manager, is now publicly released, making it crucial to update devices. [...]

A proof-of-concept (PoC) exploit for a critical Veeam Recovery Orchestrator authentication bypass vulnerability tracked as CVE-2024-29855 has been released, elevating the risk of being exploited in attacks. [...]

A proof-of-concept (PoC) exploit for a Veeam Backup Enterprise Manager authentication bypass flaw tracked as CVE-2024-29849 is now publicly available, making it urgent that admins apply the latest security updates. [...]