CVE-2013-3163
Microsoft Internet Explorer 8 through 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Internet Explorer Memory Corruption Vulnerability," a different vulnerability than CVE-2013-3144 and CVE-2013-3151.
- CVSS
- 8.8Highscored by CISA
- Exploited in the wild
- Yes, in CISA KEV since 30 Mar 2023CISA deadline for US federal agencies: 20 Apr 2023public exploit code
- EPSS
- 70.7%chance of exploitation in the next 30 daystop 0.6% of scored CVEsFIRST score of 11 Nov 2026
- Fix
- Patch availablesee the advisories in the references
- Published
- 10 Jul 2013analysed here 12 Nov 2026
Do first. The impacted product is end-of-life and should be disconnected if still in use. (CISA's required action for this KEV entry)
Summary
Triage
The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.
Affected products
Products named in our analysis
- microsoft:internet_explorer
Fix and mitigation
WAF and other mitigations
Can a WAF block it? No. This is an out-of-bounds write, a memory-corruption bug. Generic WAF rules do not recognise the input that triggers it; only a rule written for this specific CVE can, and only if the triggering request has a recognisable shape.
Also consider: patch
Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Remediation steps (AI-written)
Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.
Exploitation evidence
- CISA KEV catalog
- Listed since 30 Mar 2023.
- CISA due date
- 20 Apr 2023, the remediation deadline for US federal agencies
- CISA required action
- The impacted product is end-of-life and should be disconnected if still in use.
- Public exploit code
- Yes: 1 on Exploit-DB · 1 Metasploit module
- CISA SSVC
- exploitation active, automatable no, technical impact totalAssessed by CISA 10 Feb 2025 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.
Exploit-DB
- Microsoft Internet Explorer - CAnchorElement Use-After-Free (MS13-055) (Metasploit)remote, 10 Sept 2013, verified by Exploit-DB
Metasploit
- exploit/windows/browser/ms13_055_canchorexploit, rank normal
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
Timeline
- 10 Jul 2013Published
- 10 Sept 2013First public exploit or proof of concept62 days (about 2 months) later
- 30 Mar 2023Added to CISA KEV (exploited in the wild)3,488 days (about 10 years) later
- 20 Apr 2023CISA remediation due date (US federal agencies)21 days later
- 10 Feb 2025CISA SSVC assessment: exploitation active663 days (about 2 years) later
- 22 Oct 2025CVE record last updated253 days (about 8 months) later
- 12 Nov 2026Analysed by vulneraibility.com387 days (about 1 year) later
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Metric | Value | What it means |
|---|---|---|
| Attack vector | NetworkReachable over the internet or any routable network. | Reachable over the internet or any routable network. |
| Attack complexity | LowRepeatable attack, no special conditions. | Repeatable attack, no special conditions. |
| Privileges required | NoneThe attacker needs no prior access. | The attacker needs no prior access. |
| User interaction | RequiredA victim must click, open or otherwise cooperate. | A victim must click, open or otherwise cooperate. |
| Scope | UnchangedImpact stays within the vulnerable component. | Impact stays within the vulnerable component. |
| Confidentiality | HighTotal data disclosure possible. | Total data disclosure possible. |
| Integrity | HighComplete modification possible. | Complete modification possible. |
| Availability | HighFull outage possible. | Full outage possible. |
Common questions
Is CVE-2013-3163 being exploited?
Yes. CVE-2013-3163 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2013-3163?
CVE-2013-3163 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2013-3163?
Yes. A fix has been recorded for CVE-2013-3163. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2013-3163 affect?
CVE-2013-3163 affects microsoft:internet_explorer. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
References
4 references in the CVE record, grouped by the tags the record gives them.
Advisories (2)
- docs.microsoft.com /en-us/security-updates/securitybulletins/2013/ms13-055
- us-cert.gov /ncas/alerts/TA13-190A
Other links (2)
- oval.cisecurity.org /repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17363
- cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3163
Where the data on this page comes from
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- Exploit-DB: published exploits
- Metasploit Framework: exploit and scanner modules
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.
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