A vulnerability has been identified in Simcenter Femap 2020.2 (All versions < V2020.2.MP3), Simcenter Femap 2021.1 (All versions < V2021.1.…

published 2021-06-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14154

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits: 0; none known

A vulnerability has been identified in Simcenter Femap 2020.2 (All versions < V2020.2.MP3), Simcenter Femap 2021.1 (All versions < V2021.1.MP3). The femap.exe application lacks proper validation of user-supplied data when parsing FEMAP files. This could result in an out of bounds write past the end of an allocated structure, a different vulnerability than CVE-2021-27387. An attacker could leverage this vulnerability to execute code in the context of the current process. (ZDI-CAN-12820)

Patch / fix

fixed in 1 links 1

siemens simcenter_femap 2020.2

cert-portal.siemens.com/productcert/pdf/ssa-133038.pdf advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-159-12 updated 2025-05-06 cvss 7.8

Siemens Simcenter Femap

Siemens Simcenter Femap 2020.2 <V2020.2.MP3
affected: fixed in V2020.2.MP3, mitigation
Siemens Simcenter Femap 2021.1 <V2021.1.MP3
affected: fixed in V2021.1.MP3, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Siemens Simcenter Femap 2020.2
Siemens Simcenter Femap 2021.1

Classification

Weakness

CWE-787 Out-of-bounds Write

References

cert-portal.siemens.com /productcert/pdf/ssa-133038.pdf
patch, vendor-advisory
zerodayinitiative.com /advisories/ZDI-21-781/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2021-27399
NVD CVE-2021-27399

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary