CVE-2021-27137Vulnerability
DD-WRT Stack-Based Buffer Overflow Vulnerability
Exploited in the wildCISA added it to its Known Exploited Vulnerabilities list on .
Reported by 1 independent source · first reported by Recorded Future · last reported
Last reported 2 months ago
CISA KEVAdded 21 Jul 2026
Fix due 24 Jul 2026
Used by ransomware: not knownCISA KEV catalogue
Fix due 24 Jul 2026
Used by ransomware: not knownCISA KEV catalogue
EPSS4.0%
higher than 90% of CVEsFIRST EPSS, as of 23 Oct 2026
higher than 90% of CVEsFIRST EPSS, as of 23 Oct 2026
What the reports say
2 reports, newest first · the exact sentence from each-
July 2026 CVE Landscape“CVE-2021-27137”
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June 2026 CVE Landscape“CVE-2021-27137”
Indicators reported together
named in the same reportsAlso named with it: CVE-2026-25089, CVE-2026-39808, CVE-2025-55182, CVE-2026-46817, CVE-2026-48907, CVE-2026-12569, CVE-2025-49113, CVE-2026-33824, CVE-2024-42009, CVE-2026-15409, CVE-2026-15410, CVE-2026-11645, CVE-2026-42897, CVE-2026-28318, CVE-2026-20230, CVE-2026-35616, CVE-2026-33825, CVE-2026-21509, CVE-2025-8088, CVE-2018-0802
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