CVE-2026-107580 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the decoding of message header fields in Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the IMAP, SMTP and POP3 services, or the webmail, unavailable by sending a message. The server unfolded a decoded heade...

EUVD-2026-94862

Inefficient algorithmic complexity in the decoding of message header fields in Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the IMAP, SMTP and POP3 services, or the webmail, unavailable by sending a message. The server unfolded a decoded heade...

CVE-2026-107580 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the decoding of message header fields in Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the IMAP, SMTP and POP3 services, or the webmail, unavailable by sending a message. The server unfolded a decoded heade...

EUVD-2026-94861

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579

Inefficient algorithmic complexity in the bounce and complaint processing of Progressive Robot hMailServer 6.3.4 and 6.3.5 allows a remote unauthenticated attacker to stop mail delivery by sending messages, when bounce processing or complaint processing is enabled or a mailing list is managed by...

CVE-2026-107579

Progressive Robot hMailServer versions 6.3.4 and 6.3.5 are vulnerable to a high-severity denial-of-service (DoS) condition due to inefficient algorithmic complexity in bounce and complaint processing. When bounce processing, complaint processing, or mailing list management is enabled, an unauthen...

EUVD-2026-94860

Improper link resolution and external control of file paths in the administrative command-line operations of hMailServer.exe in Progressive Robot hMailServer 6.3.4 and 6.3.5 allow a local attacker who already runs code as the low-privilege service account to escalate privilege. On Windows,...

CVE-2026-107578 Improper Link Resolution Before File Access ('Link Following') in hMailServer

Improper link resolution and external control of file paths in the administrative command-line operations of hMailServer.exe in Progressive Robot hMailServer 6.3.4 and 6.3.5 allow a local attacker who already runs code as the low-privilege service account to escalate privilege. On Windows,...

CVE-2026-107578

Progressive Robot hMailServer versions 6.3.4 and 6.3.5 are vulnerable to local privilege escalation due to improper link resolution and external control of file paths in the hMailServer.exe administrative command-line operations. On Windows , a local attacker controlling the low-privilege service...

CVE-2026-107578 Improper Link Resolution Before File Access ('Link Following') in hMailServer

Improper link resolution and external control of file paths in the administrative command-line operations of hMailServer.exe in Progressive Robot hMailServer 6.3.4 and 6.3.5 allow a local attacker who already runs code as the low-privilege service account to escalate privilege. On Windows,...

CVE-2026-107576

Progressive Robot hMailServer versions 6.0.0 through 6.3.5 are vulnerable to a Denial of Service (DoS) attack due to inefficient algorithmic complexity in inbound DKIM and ARC signature verification. The root cause is that building the canonical header and selecting fields for the h= tag scales q...

EUVD-2026-94859

Inefficient algorithmic complexity in the inbound DKIM and ARC signature verification of Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the mail services unavailable by sending a message. Building the canonical header and choosing the header...

CVE-2026-107576 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the inbound DKIM and ARC signature verification of Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the mail services unavailable by sending a message. Building the canonical header and choosing the header...

CVE-2026-107576 Inefficient Algorithmic Complexity in hMailServer

Inefficient algorithmic complexity in the inbound DKIM and ARC signature verification of Progressive Robot hMailServer 6.0.0 through 6.3.5 allows a remote unauthenticated attacker to make the mail services unavailable by sending a message. Building the canonical header and choosing the header...

EUVD-2026-94858

Inefficient algorithmic complexity and a non-terminating loop in the MIME processing of received messages in Progressive Robot hMailServer 6.0.0 through 6.3.5 allow a remote unauthenticated attacker to make the mail services unavailable by sending a message. Removing a MIME header parameter whose...

CVE-2026-107577 Loop with Unreachable Exit Condition ('Infinite Loop') in hMailServer

Inefficient algorithmic complexity and a non-terminating loop in the MIME processing of received messages in Progressive Robot hMailServer 6.0.0 through 6.3.5 allow a remote unauthenticated attacker to make the mail services unavailable by sending a message. Removing a MIME header parameter whose...

CVE-2026-107577

Progressive Robot hMailServer versions 6.0.0 through 6.3.5 are vulnerable to a non-terminating loop and inefficient algorithmic complexity during MIME processing of received messages. A remote unauthenticated attacker can trigger a perpetual loop by sending a message where a MIME header parameter...