Security readout for executives and security teams
Plain-English summary
CVE-2026-26120 is an SSRF-related tampering vulnerability in Microsoft Bing. The bundle says an unauthenticated network attacker could cause tampering. Severity is medium, with limited confidentiality and availability impact indicated. The provided sources do not identify customer-managed versions or active exploitation.
Executive priority
Handle as a moderate-priority vendor vulnerability. It does not currently justify emergency response based on the bundle, but security teams should confirm Bing exposure and follow Microsoft guidance.
Technical view
The issue is classified as CWE-918, server-side request forgery, affecting Microsoft Bing. The CVSS 3.1 score is 6.5 with network access, low complexity, no privileges, and no user interaction. The temporal metrics in the bundle indicate proof-of-concept exploit maturity and official remediation, but no exploit details are provided.
Likely exposure
The source bundle names only Microsoft Bing and provides no affected version range or customer-managed component. Organizations should treat exposure as tied to Bing usage or integrations and confirm applicability through Microsoft’s advisory.
Exploitation context
The bundle does not support a claim of active exploitation, and KEV is false. It indicates possible unauthenticated network exploitation and proof-of-concept maturity, but gives no exploit path, affected endpoint, or operational detail.
Researcher notes
Evidence is thin: no affected versions, endpoints, technical root cause, or exploit narrative are included. The strongest grounded facts are SSRF classification, Microsoft Bing as affected product, unauthenticated network attack conditions, CVSS 6.5, and official remediation indicated.
Mitigation direction
- Review the MSRC advisory for official remediation and service-specific guidance.
- Inventory applications, workflows, or integrations that depend on Microsoft Bing.
- Monitor Microsoft’s advisory for scope, status, or severity changes.
- Escalate unusual Bing-related network behavior for investigation.
Validation and detection
- Check whether your organization uses Microsoft Bing-dependent services or integrations.
- Review the MSRC entry for any listed remediation state or customer action.
- Confirm security monitoring covers unexpected server-side requests involving Bing workflows.
- Track the CVE record for updated affected-product details.
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-918: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-26120 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C
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.
SSVC decision data
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C3.92.5microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:P/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Bing Tampering VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
Server-Side Request Forgery (SSRF)
Server-Side Request Forgery (SSRF) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.