Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker crash SAP Internet Graphics Service after obtaining an existing system state value. The reported impact is service unavailability only; sources say data cannot be viewed or modified. Business urgency is mainly about disruption to SAP-dependent graphics or reporting workflows.
Executive priority
Treat this as a moderate availability risk. Prioritize remediation for SAP systems where IGS supports business-critical functions or is reachable from broad networks. It is lower urgency than confidentiality or integrity flaws, based on the provided evidence.
Technical view
CVE-2021-27620 is a CWE-787 issue in SAP Internet Graphics Service. Insufficient input validation in Ups::AddPart() can cause internal memory corruption and a crash when a malicious IGS request is submitted. CVSS is 5.9: network reachable, unauthenticated, high attack complexity, availability impact only.
Likely exposure
Exposure is likely limited to organizations running SAP Internet Graphics Service in the listed 7.20, 7.20EXT, 7.53, 7.20_EX2, or 7.81 branches and allowing network access to IGS. The bundle does not identify specific internet-facing deployments.
Exploitation context
The source bundle does not report active exploitation, and the CVE is not marked KEV. Exploitation is described as unauthenticated but high complexity because the attacker must first retrieve an existing system state value. No public exploit details are included in the provided sources.
Researcher notes
Key constraints are high attack complexity and availability-only impact. The description requires an existing system state value before the malicious request. Sources do not provide patch details, proof-of-concept status, vulnerable configuration specifics, or evidence of exploitation.
Mitigation direction
- Check SAP Note 3021050 for the official correction and deployment prerequisites.
- Review SAP Patch Day guidance referenced by the SAP wiki page.
- Reduce unnecessary network access to SAP Internet Graphics Service where feasible.
- Monitor affected SAP systems for unexplained IGS crashes or availability incidents.
Validation and detection
- Inventory SAP Internet Graphics Service instances and versions across SAP landscapes.
- Confirm whether listed IGS versions or branches are present in production.
- Verify SAP Note 3021050 applicability through authorized SAP support access.
- Check logs and monitoring for recurring IGS crashes or availability degradation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-27620 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999CVE reference
- https://launchpad.support.sap.com/#/notes/3021050CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.