{"cve":"CVE-2020-15173","nvd":{"published":"2020-09-09T23:15:10.977","modified":"2026-06-17T02:56:11.750","status":"Modified","description":"In ACCEL-PPP (an implementation of PPTP/PPPoE/L2TP/SSTP), there is a buffer overflow when receiving an l2tp control packet ith an AVP which type is a string and no hidden flags, length set to less than 6. If your application is used in open networks or there are untrusted nodes in the network it is highly recommended to apply the patch. The problem was patched with commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b As a workaround changes of commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b can be applied to older versions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-120","CWE-119"],"references":["https://github.com/accel-ppp/accel-ppp/commit/2324bcd5ba12cf28f47357a8f03cd41b7c04c52b","https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-rr68-fchr-69vf","https://github.com/accel-ppp/accel-ppp/commit/2324bcd5ba12cf28f47357a8f03cd41b7c04c52b","https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-rr68-fchr-69vf"],"products":["accel-ppp:accel-ppp"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-15173","score":0.01183,"percentile":0.67785,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}