PaperCut

Related CVEsby mentions

• CVE-2026-820789.42%
  Unsafe Reflection RCE in PaperCut NG/MF, Chained with Auth Bypass in Attacks
  CVE-2026-82078 is an unsafe dynamic class loading flaw (unsafe reflection, CWE-470) in the database connection utilities of PaperCut NG and PaperCut MF: the software instantiates a database driver class based on a configurable driver name without validating it against an allowlist of approved drivers. An attacker who can manipulate system configuration parameters can point that setting at classes of their choosing, causing the server to execute arbitrary Java bytecode residing on the application classpath in the security context of the PaperCut server process. On its own the issue is rated 9.4 (Critical) with high privileges required, but when chained with the companion authentication bypass CVE-2026-81578 it yields unauthenticated remote code execution on the print-management server. All PaperCut NG and MF deployments are in scope; affected version ranges were not specified in the available data, so administrators should consult PaperCut's advisory for fixed versions. The flaw is confirmed exploited in the wild as a zero-day: it was added to CISA's KEV catalog on 2026-08-31, and public reporting describes an AI-orchestrated campaign that compromised PaperCut servers at roughly 395 organizations (~440 servers), with EPSS currently at 1.7% (76th percentile).
  · PaperCut NG · PaperCut MF KEVmass
• CVE-2026-815788.82%
  Missing Authentication for Critical Function in PaperCut NG/MF Web Interface
  CVE-2026-81578 is an improper access control flaw (CWE-305) in the web management interface of PaperCut MF and PaperCut NG in which administrative requests from unauthenticated remote users trigger backend actions before access validation completes. An attacker can invoke administrative functions without logging in, allowing modification of certain system configurations. When chained with CVE-2026-82078 (unsafe dynamic class loading), the flaw has been used to achieve unauthenticated code execution. Any organization running PaperCut NG/MF, particularly servers whose web management interface is reachable from the internet or untrusted networks, is affected. The vulnerability was added to CISA KEV on 2026-08-31 and is being exploited in the wild as part of an AI-orchestrated campaign that compromised roughly 395–440 organizations.
  · PaperCut MF · PaperCut NG KEVlarge
• CVE-2021-422877.577%
  Privilege Escalation in Microsoft Active Directory Domain Services
  CVE-2021-42287 is an elevation-of-privilege vulnerability in Microsoft Active Directory Domain Services (AD DS) affecting multiple supported Windows Server releases. An attacker with any low-privileged domain account can trigger it — commonly in combination with the related sAMAccountName spoofing flaw CVE-2021-42278 — by manipulating account name attributes so the Kerberos Key Distribution Center issues tickets that grant rights normally reserved for domain controllers. The result is escalation from a standard user to domain administrator, giving the attacker full control over the Windows domain, a capability that is directly useful for ransomware deployment and data theft. Any organization running Active Directory on the affected Windows Server versions is exposed, which amounts to essentially every enterprise Windows network. The flaw is actively exploited: it was added to CISA's Known Exploited Vulnerabilities catalog on 2022-04-11 with known ransomware use, and EPSS assigns it a 77.2% probability of exploitation within 30 days.
  · microsoft windows server 2004 windows server 2004 · microsoft windows server 2008 windows server 2008 KEV ransomwaremass
• CVE-2021-422787.573%
  Privilege Escalation via sAMAccountName Spoofing in Microsoft Active Directory
  CVE-2021-42278 is an elevation of privilege flaw in Microsoft Active Directory Domain Services (AD DS) caused by improper handling of changes to a computer account's sAMAccountName, allowing an attacker to 'spoof' a domain controller's name. A low-privileged authenticated user who can create or rename computer accounts (possible by default for ordinary domain users under MachineAccountQuota) renames a machine account to match a domain controller, obtains a Kerberos ticket for that name, and — typically chained with the related flaw CVE-2021-42287 — impersonates the domain controller to gain domain administrator rights. Successful exploitation yields full control of the Active Directory domain, which attackers, including ransomware operators, use to move laterally and deploy ransomware. Any organization running Active Directory on the affected Windows Server releases is exposed, though only servers with the AD DS role (domain controllers) reachable by an attacker with valid domain credentials are directly exploitable. The flaw is under active exploitation: it was added to CISA's Known Exploited Vulnerabilities catalog on 2022-04-11 with known ransomware use, and EPSS assigns a 73.3% probability of exploitation within 30 days.
  · microsoft Windows Server 2004 (AD DS) Affected AD DS builds per Microsoft advisory; source data lists no specific version ranges · microsoft Windows Server 2008 (AD DS) Affected AD DS builds per Microsoft advisory; source data lists no specific version ranges KEV ransomwaremass

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