CVE-2026-20958

MEDIUMNVD 5.45.4—

5.4

Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

CVSS v3: 5.4
EG Score: 5.4(medium)
EPSS: 37.4%
KEV: Not listed

Published

January 13, 2026

Last Modified

January 14, 2026

References (1)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20958

Vendor Advisories for CVE-2026-20958(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-20958
Microsoft Security Response Center (MSRC)High
Microsoft SharePoint Information Disclosure Vulnerability

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:47 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-02 20:13 UTCepss_batch
2026-06-02 20:13 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:40 UTCEG score recompute
2026-05-29 13:40 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-20958?

CVE-2026-20958 is a medium vulnerability published on January 13, 2026. Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.

When was CVE-2026-20958 disclosed?

CVE-2026-20958 was first published in the National Vulnerability Database on January 13, 2026, with the most recent update on January 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-20958 actively exploited?

CVE-2026-20958 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-20958?

CVE-2026-20958 has a CVSS v3 base score of 5.4 (NVD).

How do I remediate CVE-2026-20958?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20958, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-20958

Published

Last Modified

References (1)

Vendor Advisories for CVE-2026-20958(1)

Weakness Classification(1)

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-20958?

Same vendor

Same CWE

CVE-2026-20958

📅 Published

🔄 Last Modified

🔗 References (1)

📣 Vendor Advisories for CVE-2026-20958(1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-20958?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (1)

Vendor Advisories for CVE-2026-20958(1)

Frequently asked(5)

Related CVEs(same vendor + same CWE)