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CVE Record

CVE-2021-26474: UNAUTHENTICATED SERVER SIDE REQUEST FORGERY IN VEMBU PRODUCTS

Various Vembu products allow an attacker to execute a (non-blind) http-only Cross Site Request Forgery (Other products or versions of products in this family may be affected too.)

HighCVSS 8.6Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-26474 is a high-severity unauthenticated server-side request forgery issue reported in various Vembu products. It could let an outside attacker make the affected server fetch HTTP resources and expose sensitive responses. The structured record does not name exact affected products or versions.

Executive priority

Treat as high priority for any exposed Vembu deployment. The main business risk is confidential data exposure through server-side access to internal or restricted HTTP resources. Scope uncertainty means inventory and vendor confirmation matter before declaring systems unaffected.

Technical view

The CVE describes non-blind, HTTP-only SSRF/CSRF-like behavior reachable over the network without credentials or user interaction. CVSS 3.1 is 8.6 with high confidentiality impact, changed scope, and no stated integrity or availability impact. Product and version scope remains incomplete in the supplied record.

Likely exposure

Organizations running Vembu backup or related products are the likely exposure group, especially if management or service interfaces are reachable from untrusted networks. Exact affected products and versions are not specified in the provided CVE metadata.

Exploitation context

The source bundle does not show CISA KEV listing or other cited confirmation of active exploitation. The vulnerability is still concerning because the CVSS vector indicates unauthenticated, low-complexity network reachability and high confidentiality impact.

Researcher notes

The record is sparse: affected vendor, product, CPE, CWE, and versions are marked unavailable. The description mixes SSRF terminology with CSRF wording, but the title and CVSS confidentiality impact support an SSRF-centered assessment. Avoid assuming exploit availability or patch details from this bundle alone.

Mitigation direction

  • Check Vembu, DIVD, and WBSEC guidance for affected versions and fixed releases.
  • Upgrade affected Vembu deployments if vendor guidance identifies a patched version.
  • Restrict Vembu interfaces to trusted administrative networks or VPN access.
  • Limit server egress to internal services and cloud metadata endpoints.
  • Monitor Vembu servers for unusual outbound HTTP requests.

Validation and detection

  • Inventory all Vembu products, editions, and versions in use.
  • Compare deployments against vendor, DIVD, and WBSEC advisories.
  • Confirm no Vembu service interfaces are internet-accessible unless explicitly required.
  • Review logs for unauthenticated requests followed by unexpected outbound HTTP traffic.
  • Check whether segmentation blocks access from Vembu servers to sensitive internal resources.
Prepared
Confidence
medium
Sources
6

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

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CVE-2021-26474 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
High
CVSS
8.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

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.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
8.6CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N3.94Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.6High
CVSS 3.1 vector shape for CVE-2021-26474Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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.