CVE-2021-39275: exploitation status and patch state

CVE-2021-39275 · CVSS 9.8 CRITICAL · EPSS 39%

ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier.

Is CVE-2021-39275 exploited?

• Not in the CISA KEV catalog.
• EPSS puts exploitation in the next 30 days at 39%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

No affected package list recorded here yet.

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2021-39275

• Exposed Cameras Become State ISR Tools (2026-07-21)

Primary sources

• NVD record

What this record does not say

• No affected package data.
• No patch identifier.

KEV and EPSS are re-checked daily. Record last updated 2026-08-11.