How severe is CVE-2025-53816?

CVE-2025-53816 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-53816 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53816?

CVE-2025-53816 affects 7-zip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-53816?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-53816 have an EU (EUVD) identifier?

Yes. CVE-2025-53816 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21791.

When was CVE-2025-53816 published?

CVE-2025-53816 was published on 2025-07-17 and last updated on 2026-06-17.

CVE-2025-53816

CVE-2025-53816 is a high-severity vulnerability in 7-zip with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 5.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-21791
Weakness: CWE-122
Affected product: 7-zip
Published: 2025-07-17
Last modified: 2026-06-17

Description

7-Zip is a file archiver with a high compression ratio. Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0. Version 25.0.0 contains a fix for the issue.

Frequently asked questions

What is CVE-2025-53816?: 7-Zip is a file archiver with a high compression ratio. Zeroes written outside heap buffer in RAR5 handler may lead to memory corruption and denial of service in versions of 7-Zip prior to 25.0.0. Version 25.0.0 contains a fix for the issue.
How severe is CVE-2025-53816?: CVE-2025-53816 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-53816 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53816?: CVE-2025-53816 affects 7-zip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-53816?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-53816 have an EU (EUVD) identifier?: Yes. CVE-2025-53816 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-21791.
When was CVE-2025-53816 published?: CVE-2025-53816 was published on 2025-07-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:7-zip:7-zip:*:*:*:*:*:*:*:*

More vulnerabilities in 7-zip

CVE-2008-6536 — Critical (CVSS 10.0): Unspecified vulnerability in 7-zip before 4.5.7 has unknown impact and remote attack vectors, as demonstrated by the…
CVE-2026-48095 — High (CVSS 8.8): 7-Zip is a file archiver with a high compression ratio. Versions 26.00 and prior contain a heap buffer overflow…
CVE-2018-10172 — High (CVSS 8.8): 7-Zip through 18.01 on Windows implements the "Large memory pages" option by calling the LsaAddAccountRights function…
CVE-2016-2335 — High (CVSS 8.8): The CInArchive::ReadFileItem method in Archive/Udf/UdfIn.cpp in 7zip 9.20 and 15.05 beta and p7zip allows remote…
CVE-2025-11002 — High (CVSS 7.8): 7-Zip ZIP File Parsing Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote…
CVE-2025-11001 — High (CVSS 7.8): 7-Zip ZIP File Parsing Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote…

All CVEs affecting 7-zip →

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities

CVE-2026-46752 — Critical (CVSS 10.0): Redis Lua HEAP overflow in cjson library vulnerability in Apache Kvrocks. This issue affects Apache Kvrocks: from…
CVE-2026-24822 — Critical (CVSS 10.0): Out-of-bounds Write, Heap-based Buffer Overflow vulnerability in ttttupup wxhelper (src modules). This vulnerability is…
CVE-2025-23123 — Critical (CVSS 10.0): A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a…
CVE-2022-34819 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions <…
CVE-2026-44050 — Critical (CVSS 9.9): A heap-based buffer overflow in the CNID daemon comm_rcv() function in Netatalk 2.0.0 through 4.4.2 allows a remote…
CVE-2026-49841 — Critical (CVSS 9.8): FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to…

Browse all CWE-122 (Heap-based Buffer Overflow) vulnerabilities →