NGINX before 1.13.6 has a buffer overflow for years that exceed four digits, as demonstrated by a file with a…
SummaryAI-written · deepseek-v4-flashAI-written · deepseek-v4-flashWritten by a language model from the source data on this page. Not reviewed by a person. Generated 23 Oct 2026.
NGINX before 1.13.6 contains a critical buffer overflow in the autoindex module triggered by file modification dates with years exceeding four digits, such as a 1969 date or a false far-future date, which causes an integer overflow. Any system running an affected version of NGINX is impacted.
Official description · CVE.orgSource dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. Copied from CVE.org.
NGINX before 1.13.6 has a buffer overflow for years that exceed four digits, as demonstrated by a file with a modification date in 1969 that causes an integer overflow (or a false modification date far in the future), when encountered by the autoindex module.
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown.Breakdown
28.4 / 100
Exploited
Not confirmed
Reports
1
Tactics
0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Disclosed on 6 Jun 2021. No public exploit code or confirmed exploitation is recorded.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linked
No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Named in 1 threat reportMachineMachine-matchedFound by keyword or pattern matching over threat-report text. Not reviewed by a person. Exact CVE id found in the report text.
1 reportTrustwave
Reports are matched by finding the exact id CVE-2017-20005 in their text; nobody has reviewed the match. One passage is shown per report, at most 320 characters, linked to the original.