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CVE-2021-33356: Multiple privilege escalation vulnerabilities in RaspAP 1.5 to 2.6.5 could allow an authenticated remote at...

Multiple privilege escalation vulnerabilities in RaspAP 1.5 to 2.6.5 could allow an authenticated remote attacker to inject arbitrary commands to /installers/common.sh component that can result in remote command execution with root privileges.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This issue affects RaspAP 1.5 through 2.6.5. An authenticated remote user could turn administrative access into root-level command execution. For executives, the main concern is loss of control over a network management device, not broad unauthenticated internet compromise based on the provided sources.

Executive priority

Treat this as a high-priority exposure for affected RaspAP devices because successful abuse can reach root privileges. Prioritize internet-reachable or broadly accessible management interfaces first.

Technical view

CVE-2021-33356 describes multiple privilege escalation command-injection flaws in RaspAP's /installers/common.sh component. The reported impact is remote command execution with root privileges by an authenticated attacker. The bundle provides code references, but no CVSS, CWE, CPE, or fixed-version details.

Likely exposure

Exposure is limited to environments running RaspAP versions 1.5 through 2.6.5. Risk is higher when RaspAP administration is reachable by shared, weakly controlled, or externally exposed authenticated users.

Exploitation context

The source bundle does not show CISA KEV inclusion or confirmed active exploitation. Public references include RaspAP code locations and an external gist, which indicates public disclosure material exists, but the provided evidence does not prove exploitation in the wild.

Researcher notes

Evidence is sparse: the CVE text gives the core impact and affected range, while references point to common.sh lines and a gist. There is no supplied CVSS vector, patch identifier, or authoritative exploit-status evidence.

Mitigation direction

  • Inventory RaspAP deployments and confirm whether versions 1.5 through 2.6.5 are present.
  • Check current RaspAP vendor guidance and releases for the appropriate fixed version or upgrade path.
  • Restrict RaspAP administrative access to trusted management networks and authorized administrators.
  • Review and tighten RaspAP credentials, especially shared or stale administrator accounts.
  • If compromise is suspected, rebuild affected devices from trusted media and rotate related secrets.

Validation and detection

  • Confirm the installed RaspAP version on each managed device.
  • Verify whether the referenced installers/common.sh revision or vulnerable release range is present.
  • Review administrative access logs for unusual authenticated activity around installer or configuration actions.
  • Check whether RaspAP management interfaces are reachable from untrusted networks.
  • Document whether vendor remediation guidance has been applied.
Prepared
Confidence
medium
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-33356 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.