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AWS acm medium security documentation change

Service: acm · 2026-02-22 · Security-related medium

File: acm/latest/userguide/dns-renewal-validation.md

Summary

Changed renewal validation start from 60 to 45 days pre-expiry. Updated event notification intervals.

Security assessment

Earlier validation window reduces certificate expiration risks. Event interval changes improve operational security without evidence of patching a vulnerability.

Diff

diff --git a/acm/latest/userguide/dns-renewal-validation.md b/acm/latest/userguide/dns-renewal-validation.md
index ff742c630..2b88ae0ca 100644
--- a//acm/latest/userguide/dns-renewal-validation.md
+++ b//acm/latest/userguide/dns-renewal-validation.md
@@ -9 +9 @@ Managed renewal is fully automated for ACM certificates that were originally iss
-At 60 days prior to expiration, ACM checks for the following renewal criteria:
+At 45 days prior to expiration, ACM checks for the following renewal criteria:
@@ -20 +20 @@ If these criteria are met, ACM considers the domain names validated and renews t
-ACM sends AWS Health events and Amazon EventBridge events if it can't automatically validate a domain during renewal. These events are sent at 45 days, 30 days, 15 days, seven days, three days, and one day prior to expiration. For more information, see [Amazon EventBridge support for ACM](./supported-events.html).
+ACM sends AWS Health events and Amazon EventBridge events if it can't automatically validate a domain during renewal. These events are sent at 30 days, 15 days, seven days, three days, and one day prior to expiration. For more information, see [Amazon EventBridge support for ACM](./supported-events.html).