ExploitedIn CISA KEVFix available

CVE-2015-1770

Exploitation confirmed. First attested on 2022-03-28 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2015-06-10
WeaknessCWE-824

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."

Timeline

dates in UTC

2015-06-1001:59CVE publishedNVD
2022-03-28Added to the CISA KEV catalogCISA KEV
2022-03-28Listed as exploited by GCVEGCVE
2022-03-28Exploitation first reportedCISA KEV
2025-02-1017:59SSVC exploitation set to activeCISA-ADP
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2015-1770?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2015-1770?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft office

Branch	Affected	Fixed in	Source
2013.x	= 2013	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply updates per vendor instructions.due 2022-04-18

Advisories and patches

docs.microsoft.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2022-03-28
Patch Due Date: 2022-04-18
Ransomware Use: Unknown
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2022-03-28
GCVEexploitation2022-03-28
CISA-ADPSSVC decisionactive2025-02-10
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-02-10
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-8242025-02-10
NVDweakness (CWE)CWE-824read 2026-10-23
FIRST EPSSEPSS score35.0 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2015-06-10
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2015-1770?

Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."

Is CVE-2015-1770 actively exploited?

Yes. CVE-2015-1770 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-04-18.

What is the CVSS score for CVE-2015-1770?

CVE-2015-1770 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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