CVE-2021-29998: siemens sinamics_perfect_harmony_gh180_firmware Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
Published 13-04-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-29998 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in siemens sinamics_perfect_harmony_gh180_firmware. EPSS estimates a 2.39% chance of exploitation in the next 30 days, higher than 83.7% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
2.39%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 13-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.
CVSS metrics
2 scores · 1 source · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.39%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
0.00 pp
From 2.39% on 19-09-2026
19-09-202619-10-2026
EPSS score2.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Siemens1 product
- sinamics_perfect_harmony_gh180_firmware≥ 2015, < 2022
Windriver1 product
- vxworks< 6.5
2 vendors · 2 products
References
4 links
us-cert.cisa.gov/ics/advisories/icsa-21-194-12X Refsource MISCThird Party AdvisoryUS Government Resource