What is CVE-2012-4895?A critical-severity flaw in Sumatrapdf, explained.
CVE-2012-4895 is a critical-severity flaw (CVSS 9.3) in Sumatrapdf from Sumatrapdfreader, published on 5 October 2012. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 5.2%. If you run an affected version, plan in the vendor’s fix.
Published 5 October 2012. Record last updated 11 April 2025. We keep this page's data up to date.
What is CVE-2012-4895? In plain terms.
It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read data, change data and take it offline.
Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability than CVE-2012-4896.
What kind of flaw is it?
- CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
How an attack on it works
Read straight from its severity rating, translated out of the shorthand.
- Where an attacker can beAnywhere on the internet
- How hard it is to pull offSome conditions needed
- Login needed firstNo login needed
- What an attacker getsCan read data, change data and take it offline
Severity vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Is CVE-2012-4895 being exploited? Not that we know of.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 5.2%. That can change at any time, which is why we keep watching.
Timeline
- Published
- Record last updated
CVE-2012-4895 scores 54. Action: Plan remediation.
We keep the score of every published flaw up to date as the evidence changes. Four things go into the score, and evidence that criminals are actually using it counts most. In order:
- Evidence it is being exploitedBiggest factor
- How severe it isStrong factor
- How widely exposed it isSmaller factor
- Threat activity around itSmaller factor
85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score.
When CVE-2012-4895 matches software you track, it lands in your list with its score and the reasons behind it.
See your own ranked list →Who is affected by CVE-2012-4895? One product.
The published record lists 1 product from 1 vendor. If you run one of these, check your version, then go to the fix below.
- Application
Sumatrapdf
Affected versionsup to 2.0.1
How do I fix CVE-2012-4895? Four steps.
- Check whether you run itCompare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
- Apply the vendor’s fixInstall the latest update from the vendor. The references list where the vendor has published details.
- If you can’t patch todayFollow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
- Keep an eye on itTrack the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.
Does CVE-2012-4895 affect you? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
- Tell us what you runPick your software from a list, or let us work it out from your website.
- We match it to every flawOver 400,000 published flaws, checked against your list.
- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
- Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
Free plan, no card needed. Nothing to install.
1 new flaw affects software Acme tracks
Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF document, a different vulnerability t...
- Matched to
- Sumatrapdf on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
CVE-2012-4895 is a critical-severity flaw in Sumatrapdf from Sumatrapdfreader, published on 5 October 2012. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read data, change data and take it offline.
It scores 9.3 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2012-4895 is 54 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 5.2%. That can change at any time, which is why we keep watching.
For Sumatrapdf from Sumatrapdfreader: up to 2.0.1.
Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.