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CVE-2026-81993: Acrobat Reader is affected by a Heap-based Buffer Overflow vulnerability that could lead to disclosure of sens

25
Routine
MEDIUM 5.5UPGRADEUPGRADEUPGRADE

CVE-2026-81993 is a medium-severity flaw (CVSS 5.5) affecting acrobat, acrobat dc, acrobat reader dc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Acrobat Reader is affected by a Heap-based Buffer Overflow vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.3% (top 78%)
CISA exploited listNo
WeaknessCWE-122
Published2026-09-08
Last modified2026-09-10
Publisher (CNA): Adobe Systems Incorporated · Vendor: adobe

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Last updated 2026-09-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

adobe acrobat UPGRADE
Affected: >= 24.001.20604 and < 24.001.30429
Fixed in: 24.001.30429
Safe to downgrade to: a release before 24.001.20604
1. Check installed version
apt-cache policy acrobat || rpm -q acrobat || acrobat --version
2. UPGRADE to 24.001.30429 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade acrobat
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade acrobat
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 24.001.20604 (Debian / Ubuntu)
apt-cache madison acrobat sudo apt install acrobat=<VERSION_BEFORE_24.001.20604> sudo apt-mark hold acrobat
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list acrobat sudo dnf downgrade acrobat-<VERSION_BEFORE_24.001.20604> sudo dnf versionlock add acrobat
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.
adobe acrobat dc UPGRADE
Affected: >= 15.008.20082 and < 26.002.21901
Fixed in: 26.002.21901
Safe to downgrade to: a release before 15.008.20082
1. Check installed version
apt-cache policy acrobat-dc || rpm -q acrobat-dc || acrobat-dc --version
2. UPGRADE to 26.002.21901 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade acrobat-dc
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade acrobat-dc
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 15.008.20082 (Debian / Ubuntu)
apt-cache madison acrobat-dc sudo apt install acrobat-dc=<VERSION_BEFORE_15.008.20082> sudo apt-mark hold acrobat-dc
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list acrobat-dc sudo dnf downgrade acrobat-dc-<VERSION_BEFORE_15.008.20082> sudo dnf versionlock add acrobat-dc
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.
adobe acrobat reader dc UPGRADE
Affected: >= 15.008.20082 and < 26.002.21901
Fixed in: 26.002.21901
Safe to downgrade to: a release before 15.008.20082
1. Check installed version
apt-cache policy acrobat-reader-dc || rpm -q acrobat-reader-dc || acrobat-reader-dc --version
2. UPGRADE to 26.002.21901 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade acrobat-reader-dc
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade acrobat-reader-dc
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 15.008.20082 (Debian / Ubuntu)
apt-cache madison acrobat-reader-dc sudo apt install acrobat-reader-dc=<VERSION_BEFORE_15.008.20082> sudo apt-mark hold acrobat-reader-dc
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list acrobat-reader-dc sudo dnf downgrade acrobat-reader-dc-<VERSION_BEFORE_15.008.20082> sudo dnf versionlock add acrobat-reader-dc
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.
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-2026-81993?

acrobat: upgrade to 24.001.30429; acrobat dc: upgrade to 26.002.21901; acrobat reader dc: upgrade to 26.002.21901. Exact commands for each OS are on this page.

Is CVE-2026-81993 being exploited?

CVE-2026-81993 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-2026-81993 affect?

CVE-2026-81993 affects acrobat, acrobat dc, acrobat reader dc. Severity is medium (CVSS 5.5). Acrobat Reader is affected by a Heap-based Buffer Overflow vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires

How urgent is CVE-2026-81993?

Priority 25/100. No elevated risk signals yet.

Software pages

Adobe Acrobat vulnerabilities

Related CVEs

References

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