Security readout for executives and security teams
Plain-English summary
This vulnerability can let an unauthenticated network attacker crash SAP Internet Graphics Service after obtaining an existing system state value. The stated impact is service unavailability only; sources say system data cannot be viewed or changed. Business urgency depends on whether affected IGS versions are reachable in production paths.
Executive priority
Treat as a moderate availability risk. It does not indicate data theft or tampering, but a crash of SAP IGS could disrupt dependent business functions. Prioritize remediation for reachable production systems and confirm SAP’s official guidance.
Technical view
CVE-2021-27627 affects SAP Internet Graphics Service versions 7.20, 7.20EXT, 7.53, 7.20_EX2, and 7.81. Insufficient input validation in ChartInterpreter::DoIt() can trigger memory corruption and crash the service. CVSS 3.0 is 5.9, with network attack vector, high attack complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely in SAP environments running the listed Internet Graphics Service versions where IGS is reachable over a network. The source bundle does not confirm whether specific deployments expose IGS externally or only internally.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle. The description requires retrieving an existing system state value first, which aligns with high attack complexity. No cited source in the bundle claims active exploitation or public exploit availability.
Researcher notes
The key technical issue is CWE-787-style memory corruption caused by insufficient input validation in ChartInterpreter::DoIt(). Evidence is limited to CVE metadata and SAP references; the provided sources do not include exploit details, fixed build identifiers, or proof of active exploitation.
Mitigation direction
- Review SAP Security Note 3021050 for official remediation instructions.
- Identify and update affected SAP Internet Graphics Service versions per SAP guidance.
- Prioritize network-reachable production IGS deployments first.
- Check SAP support channels for any version-specific workaround or patch prerequisites.
- Monitor affected systems for unexplained IGS crashes until remediation is complete.
Validation and detection
- Inventory SAP Internet Graphics Service versions across the environment.
- Confirm whether versions 7.20, 7.20EXT, 7.53, 7.20_EX2, or 7.81 are present.
- Map which IGS instances are network-reachable and business-critical.
- Review logs and monitoring for repeated crashes or availability incidents.
- Verify SAP Note 3021050 remediation status after maintenance.
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-2021-27627 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.