CVE-2021-21488: sap se sap netweaver (knowledge management) Deserialization of Untrusted Data
CVSS: 6.5v3.0MediumModified
Published 09-03-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-21488 is a medium (CVSS 6.5) Deserialization of Untrusted Data vulnerability in sap se sap netweaver (knowledge management). EPSS estimates a 1.34% chance of exploitation in the next 30 days, higher than 71.1% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.0 (CVE.org)EPSS score
1.34%
0%100%
Low · +0.05 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Knowledge Management versions 7.01, 7.02, 7.30, 7.31, 7.40, 7.50 allows a remote attacker with basic privileges to deserialize user-controlled data without verification, leading to insecure deserialization which triggers the attacker’s code, therefore impacting Availability.
CVSS metrics
4 scores · 2 sources · 3 versionsMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesSingle source
Medium 6.5Preferred score · CVE.org (CNA)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST6.5MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.34%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
+0.05 pp
From 1.29% on 22-09-2026
22-09-202622-10-2026
EPSS score1.34%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Sap1 product
- netweaver_knowledge_management7.01 | 7.02 | 7.30 | 7.31 | 7.40 | 7.50
Sap se1 product
- sap netweaver (knowledge management)< 7.01 | < 7.02 | < 7.30 | < 7.31 | < 7.40 | < 7.50
2 vendors · 2 products