diff --git a/package/nginx/0010-CVE-2025-53859.patch b/package/nginx/0010-CVE-2025-53859.patch
new file mode 100644
index 0000000000..34befebd8a
--- /dev/null
+++ b/package/nginx/0010-CVE-2025-53859.patch
@@ -0,0 +1,130 @@
+CVE: CVE-2025-53859
+Upstream: https://nginx.org/download/patch.2025.smtp.txt
+Signed-off-by: Thomas Perale <thomas.perale@mind.be>
+
+diff --git a/src/mail/ngx_mail_handler.c b/src/mail/ngx_mail_handler.c
+index 1167df3fb..d3be7f3b3 100644
+--- a/src/mail/ngx_mail_handler.c
++++ b/src/mail/ngx_mail_handler.c
+@@ -523,7 +523,7 @@ ngx_mail_starttls_only(ngx_mail_session_t *s, ngx_connection_t *c)
+ ngx_int_t
+ ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, ngx_uint_t n)
+ {
+-    u_char     *p, *last;
++    u_char     *p, *pos, *last;
+     ngx_str_t  *arg, plain;
+ 
+     arg = s->args.elts;
+@@ -555,7 +555,7 @@ ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, ngx_uint_t n)
+         return NGX_MAIL_PARSE_INVALID_COMMAND;
+     }
+ 
+-    s->login.data = p;
++    pos = p;
+ 
+     while (p < last && *p) { p++; }
+ 
+@@ -565,7 +565,8 @@ ngx_mail_auth_plain(ngx_mail_session_t *s, ngx_connection_t *c, ngx_uint_t n)
+         return NGX_MAIL_PARSE_INVALID_COMMAND;
+     }
+ 
+-    s->login.len = p++ - s->login.data;
++    s->login.len = p++ - pos;
++    s->login.data = pos;
+ 
+     s->passwd.len = last - p;
+     s->passwd.data = p;
+@@ -583,24 +584,26 @@ ngx_int_t
+ ngx_mail_auth_login_username(ngx_mail_session_t *s, ngx_connection_t *c,
+     ngx_uint_t n)
+ {
+-    ngx_str_t  *arg;
++    ngx_str_t  *arg, login;
+ 
+     arg = s->args.elts;
+ 
+     ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+                    "mail auth login username: \"%V\"", &arg[n]);
+ 
+-    s->login.data = ngx_pnalloc(c->pool, ngx_base64_decoded_length(arg[n].len));
+-    if (s->login.data == NULL) {
++    login.data = ngx_pnalloc(c->pool, ngx_base64_decoded_length(arg[n].len));
++    if (login.data == NULL) {
+         return NGX_ERROR;
+     }
+ 
+-    if (ngx_decode_base64(&s->login, &arg[n]) != NGX_OK) {
++    if (ngx_decode_base64(&login, &arg[n]) != NGX_OK) {
+         ngx_log_error(NGX_LOG_INFO, c->log, 0,
+             "client sent invalid base64 encoding in AUTH LOGIN command");
+         return NGX_MAIL_PARSE_INVALID_COMMAND;
+     }
+ 
++    s->login = login;
++
+     ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+                    "mail auth login username: \"%V\"", &s->login);
+ 
+@@ -611,7 +614,7 @@ ngx_mail_auth_login_username(ngx_mail_session_t *s, ngx_connection_t *c,
+ ngx_int_t
+ ngx_mail_auth_login_password(ngx_mail_session_t *s, ngx_connection_t *c)
+ {
+-    ngx_str_t  *arg;
++    ngx_str_t  *arg, passwd;
+ 
+     arg = s->args.elts;
+ 
+@@ -620,18 +623,19 @@ ngx_mail_auth_login_password(ngx_mail_session_t *s, ngx_connection_t *c)
+                    "mail auth login password: \"%V\"", &arg[0]);
+ #endif
+ 
+-    s->passwd.data = ngx_pnalloc(c->pool,
+-                                 ngx_base64_decoded_length(arg[0].len));
+-    if (s->passwd.data == NULL) {
++    passwd.data = ngx_pnalloc(c->pool, ngx_base64_decoded_length(arg[0].len));
++    if (passwd.data == NULL) {
+         return NGX_ERROR;
+     }
+ 
+-    if (ngx_decode_base64(&s->passwd, &arg[0]) != NGX_OK) {
++    if (ngx_decode_base64(&passwd, &arg[0]) != NGX_OK) {
+         ngx_log_error(NGX_LOG_INFO, c->log, 0,
+             "client sent invalid base64 encoding in AUTH LOGIN command");
+         return NGX_MAIL_PARSE_INVALID_COMMAND;
+     }
+ 
++    s->passwd = passwd;
++
+ #if (NGX_DEBUG_MAIL_PASSWD)
+     ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+                    "mail auth login password: \"%V\"", &s->passwd);
+@@ -674,24 +678,26 @@ ngx_int_t
+ ngx_mail_auth_cram_md5(ngx_mail_session_t *s, ngx_connection_t *c)
+ {
+     u_char     *p, *last;
+-    ngx_str_t  *arg;
++    ngx_str_t  *arg, login;
+ 
+     arg = s->args.elts;
+ 
+     ngx_log_debug1(NGX_LOG_DEBUG_MAIL, c->log, 0,
+                    "mail auth cram-md5: \"%V\"", &arg[0]);
+ 
+-    s->login.data = ngx_pnalloc(c->pool, ngx_base64_decoded_length(arg[0].len));
+-    if (s->login.data == NULL) {
++    login.data = ngx_pnalloc(c->pool, ngx_base64_decoded_length(arg[0].len));
++    if (login.data == NULL) {
+         return NGX_ERROR;
+     }
+ 
+-    if (ngx_decode_base64(&s->login, &arg[0]) != NGX_OK) {
++    if (ngx_decode_base64(&login, &arg[0]) != NGX_OK) {
+         ngx_log_error(NGX_LOG_INFO, c->log, 0,
+             "client sent invalid base64 encoding in AUTH CRAM-MD5 command");
+         return NGX_MAIL_PARSE_INVALID_COMMAND;
+     }
+ 
++    s->login = login;
++
+     p = s->login.data;
+     last = p + s->login.len;
diff --git a/package/nginx/nginx.mk b/package/nginx/nginx.mk
index 6ca1ac2075..9ea432abdb 100644
--- a/package/nginx/nginx.mk
+++ b/package/nginx/nginx.mk
@@ -19,6 +19,9 @@ NGINX_CONF_OPTS = \
 	--with-cpp="$(TARGET_CC)" \
 	--with-ld-opt="$(TARGET_LDFLAGS)"
 
+# 0010-CVE-2025-53859.patch
+NGINX_IGNORE_CVES += CVE-2025-53859
+
 # www-data user and group are used for nginx. Because these user and group
 # are already set by buildroot, it is not necessary to redefine them.
 # See system/skeleton/etc/passwd