CVE-2017-8529: Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, and

This week

MEDIUM 6.5WATCHLISTDOWNGRADEMITIGATE

CVE-2017-8529 is a medium-severity flaw (CVSS 6.5) affecting internet explorer, edge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, and Windows Server 2012 and R2 allow an attacker to detect specific files on the user's computer when affected Microsoft scripting engines do not properly handle objects in memory, aka "Microsoft Browser Information Disclosure Vulnerability".

Why this priority

EPSS top 3%: very likely to be exploited
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	14.2% (top 3%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-06-15
Last modified	2026-10-08

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-06-15 01:29 UTCPublished CVE record published
2026-10-08 22:16 UTCUpdated Record last modified

microsoft internet explorer DOWNGRADE

Affected: 11 · 9 · 10

Fixed in: no fixed release known

Safe to downgrade to: a release before 9

1. Check installed version

apt-cache policy internet-explorer || rpm -q internet-explorer || internet-explorer --version

2. No fixed release: DOWNGRADE to a release before 9 (Debian / Ubuntu)

apt-cache madison internet-explorer sudo apt install internet-explorer=<VERSION_BEFORE_9> sudo apt-mark hold internet-explorer

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list internet-explorer sudo dnf downgrade internet-explorer-<VERSION_BEFORE_9> sudo dnf versionlock add internet-explorer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

microsoft edge MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge || rpm -q edge || edge --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-8529?

internet explorer: downgrade or apply the listed mitigation; edge: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-8529 being exploited?

CVE-2017-8529 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-8529 affect?

CVE-2017-8529 affects internet explorer, edge. Severity is medium (CVSS 6.5). Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, and Windows Server 2012 and R2 allow an attacker to detect specific files on the user's computer when affected Microsoft scripting eng

How urgent is CVE-2017-8529?

Priority 52/100. EPSS top 3%: very likely to be exploited; On your watchlist

Software pages

Windows vulnerabilities · Windows Server vulnerabilities · Microsoft Edge vulnerabilities · Internet Explorer vulnerabilities

Related CVEs

CVE-2015-2423 MEDIUM 4.3 DOWNGRADE DOWNGRADE Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Window
CVE-2011-3389 MEDIUM 4.3 MITIGATE MITIGATE The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozi
CVE-2021-26411 HIGH 8.8 EXPLOITED MITIGATE DOWNGRADE Microsoft Internet Explorer Memory Corruption Vulnerability
CVE-2000-0982 HIGH 7.5 DOWNGRADE Internet Explorer before 5.5 forwards cached user credentials for a secure web site to insecure pages on the s
CVE-2021-27085 HIGH 8.8 EXPLOITED DOWNGRADE Microsoft Internet Explorer Remote Code Execution Vulnerability

References

← Back to latest CVEs