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CVE-2012-1858

38
FAUCET Score

CVE-2012-1858 describes a cross-site scripting (XSS) vulnerability in the toStaticHTML API (SafeHTML component) of Microsoft Internet Explorer 8 and 9, Communicator 2007 R2, and Lync 2010. This flaw allows remote attackers to inject malicious script via crafted HTML documents due to improper handling of event attributes. The vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial confidentiality impact, with no authentication required. While not listed in CISA's KEV catalog, exploit code is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:lync:2010:*:attendee:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:lync:2010:*:x64:*:*:*:*:*
2010CPE matchmatch criteria
cpe:2.3:a:microsoft:lync:2010:*:x86:*:*:*:*:*
2007CPE matchmatch criteria
cpe:2.3:a:microsoft:office_communicator:2007:r2:*:*:*:*:*:*
8CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

AV:N/AC:M/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
22.02%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-19777 · Jul 12, 2012
This CVE's current EPSS score of 0.2202 is in the 98th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2012/ms12-037
docs.microsoft.com / en-us/security-updates/securitybulletins/2012/ms12-039
docs.microsoft.com / en-us/security-updates/securitybulletins/2012/ms12-050
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15530
us-cert.gov / cas/techalerts/TA12-164A.html
US Government Resource
us-cert.gov / cas/techalerts/TA12-192A.html
US Government Resource