OOpen-Xchange GmbH

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Exploited and recent CVEs

• CVE-2026-73209 Medium 6.5 An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation 0.4%
• CVE-2026-73209 Medium 6.5 An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation 0.4%
• CVE-2026-73208 High 7.4 An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and chec 0.3%
• CVE-2026-73208 High 7.4 An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and chec 0.3%
• CVE-2026-52687 Medium 6.5 An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory, and open several such connections. The me 0.4%
• CVE-2026-52687 Medium 6.5 An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory, and open several such connections. The me 0.4%
• CVE-2026-52681 Low 3.1 Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also 0.3%
• CVE-2026-52681 Low 3.1 Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also 0.3%
• CVE-2026-42395 Medium 4.3 A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause 0.4%
• CVE-2026-42395 Medium 4.3 A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause 0.4%
• CVE-2026-42393 Low 3.1 The comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the configured secret. An attacker with access to the same network as the doveadm service 0.2%
• CVE-2026-42393 Low 3.1 The comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the configured secret. An attacker with access to the same network as the doveadm service 0.2%
• CVE-2026-42392 Medium 4.3 An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents 0.3%
• CVE-2026-42392 Medium 4.3 An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents 0.3%
• CVE-2026-42391 High 7.5 An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, which causes memory and CPU usage to grow disproportionately. The login process can be 0.4%
• CVE-2026-42391 High 7.5 An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, which causes memory and CPU usage to grow disproportionately. The login process can be 0.4%
• CVE-2026-42008 Medium 4.3 Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authent 0.2%
• CVE-2026-42008 Medium 4.3 Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authent 0.2%
• CVE-2026-42007 Critical 9.1 An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffe 0.3%
• CVE-2026-42007 Critical 9.1 An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffe 0.3%
• CVE-2026-40205 Medium 5.9 An attacker that holds an OAuth2 token granting only part of the required scopes can authenticate, because when more than one scope is required in the configuration, the remote token validation paths 0.2%
• CVE-2026-40205 Medium 5.9 An attacker that holds an OAuth2 token granting only part of the required scopes can authenticate, because when more than one scope is required in the configuration, the remote token validation paths 0.2%
• CVE-2026-40204 Low 3.1 None None None No publicly available exploits are known. 0.2%
• CVE-2026-40204 Low 3.1 None None None No publicly available exploits are known. 0.2%
• CVE-2026-40203 Low 3.7 When IMAP compression is enabled, the same compression state is reused across responses in a session, so response sizes depend on both attacker-supplied mail and other mail in the same mailbox. An att 0.3%
• CVE-2026-40203 Low 3.7 When IMAP compression is enabled, the same compression state is reused across responses in a session, so response sizes depend on both attacker-supplied mail and other mail in the same mailbox. An att 0.3%
• CVE-2026-40019 Medium 5.9 An unauthenticated attacker can send a truncated quoted argument to the ManageSieve login process, which makes it spin in an infinite loop consuming CPU. This can cause degradation or denial of servic 0.4%
• CVE-2026-40018 High 7.4 None None None No publicly available exploits are known. 0.3%
• CVE-2026-40018 High 7.4 None None None No publicly available exploits are known. 0.3%
• CVE-2026-40017 Medium 6.5 An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal hash table, which makes the IMAP THREAD command consume CPU disproportionate to th 0.3%